Telescope is generally to see how far --- sony telescope --- 99 military binoculars, under normal light, normal vision can see a distance of 23 meters approximately 9 cm high figure
1, the telescope can see how far? This is mainly the performance of the telescope, weather conditions, the target size of the test according to the owner: a clear day you can see this Nikula 8X42 binoculars meters telegraph pole a few hundred meters of the insects, outsiders face tens of kilometers of a moving vehicle at night you can see the densely packed on the moon craters, Jupiter's four satellites, nebulae and other astronomical interested friends can try, in fact, a good telescope to bring your pleasure and use are often beyond your imagination. Some advertising that a telescope can see the dozens of hundreds of kilometers away, one meter of the target, in fact, in theory, the ground near the atmospheric density of dust, more importantly, the earth is round song, so impossible The level of observation on the ground to 50 kilometers one meter target.
2, what kind of telescope is right for me? According to your needs, generally carried out outside looking mirror should be option to use the volume is small, lightweight, zoom in 6-8 times, because of the long hand-held telescope can cause jitter, jitter on the observed effect is great; If the home is placed on viewing and astronomical observations, it can choose to use the large diameter of the large multiples of single / binoculars; the case then fascinated by the military mirror, you may wish to choose a with ranging dense line of species, I believe, you will find another kind of pleasure from the observation and ranging
3, multiples of the bigger the better? The answer is no. If the handheld observation, not trained specifically to training and arm strength the average person, 12 times the telescope handheld has a limit of multiples over jitter, can lead to dizziness, nausea and discomfort. interest in this observation is a big blow. Just think, buy a dream telescope, but because of the inconvenience of carrying and use, while not always use it, it is a much regret!
4, the diameter of the exit pupil and exit pupil distance? The pupil is the image through a telescope eyepiece after the formation of spot size. This is also an important indicator of the telescope, which represents the brightness of the telescope can achieve imaging, in general, the telescope exit pupil of 2.5 mm to 4 mm, more suitable for daytime use, between 4 mm to 7 mm telescope day and low-light environments still can be observed, and 2.5 mm below the telescope, even during the day, image brightness is very low, and the human eye pupil alignment difficulties, poor comfort of the observation. The simple formula of the exit pupil is the lens diameter / ratio = exit pupil diameter. For example, W90842 binoculars exit pupil diameter = 42/8 = 5.25 mm, even in the dusk dawn of time can still be observed. The exit pupil distance is able to see the entire field of view, the eye from the eyepiece the most remote. This is also an important parameter of the telescope exit pupil distance is too short, the eye must be close to the eyepiece to see the entire field of view, the eye will be very tired, and if the pupil distance is too long and eyepiece cover is too short, the observation is prone to black shadow. Grow pupil distance of the telescope is suitable for people who wear eye. Pupil telescope eyepiece cover design and some grow into a scalable type, then it applies to a person with normal vision, but also applies to the person wearing the eye, such as the W90842 binoculars exit pupil distance 22MM.
rlated blog source: Sony brand military remote video camera ( 12 million pixels )
2012年6月3日星期日
2012年5月23日星期三
How To Improve Laptop Battery Life
Everyone who has ever used a laptop knows that sinking feeling you get in the pit of your stomach when your laptop battery is about to die. Battery life is still one of the single most important issues that people consider when purchasing a new notebook. And why not? Battery life is the key factor to the mobility of a laptop computer. Sure, we all like thin and light PCs but even the thinnest, lightest laptop is nothing but a paperweight when the battery dies.
In some cases you might be able to turn to an extended battery for your laptop, but as manufacturers race to make thinner and lighter laptops, many of these "ultrabooks" have integrated batteries that cannot be removed or replaced without completely disassembling the laptop. So what can you do to squeeze out a few extra minutes (or even a few extra hours) of battery life? With a few minutes worth of simple changes, you can easily get your work done without constantly looking for the nearest power outlet.
Most of this guide will focus on modern notebooks running Windows 7, but much of the advice below holds true even if you're running Windows XP or planning to move to Windows 8.
Don't Overwork Your Laptop
In the simplest terms, anything your laptop does requires power. Therefore, your laptop is wasting power every time it does something that you don't "need" it to do. One simple solution is to close applications you aren't using rather than leaving programs running in the background or minimized in the Windows taskbar. However, you can go one step further.
Every laptop running a modern version of Windows has the ability change power profiles using the Windows Power Management. Click on that Dell Latitude CPi A Series Laptop Battery icon on the bottom of your screen, and make sure your notebook is set to "Balanced" or "Power Saver" if you want a quick and simple way to limit unnecessary power consumption.
The "High Performance" setting is great if you are encoding video or playing games but it makes your processor and hard drive(s) work harder than they have to, using more power and throwing out more heat. Most notebooks also include power regulation software from the laptop manufacturer (HP Power Advisor, Toshiba Power Saver, etc.) which can be used to help reduce overall power consumption.
Being Wireless Will Eventually Leave You Powerless
We usually need our laptops to be connected to a wireless network of some kind; Wi-Fi, 3G broadband, your 4G USB modem, or even your Bluetooth external keyboard and mouse at the office. The problem is that constantly sending and receiving wireless signals drains a significant portion of your notebook's battery. The solution is simple: If you're not actively using a wireless connection then make sure you turn it off. You can disable Wi-Fi or Bluetooth on your laptop either by clicking on the wireless network icon on the bottom right corner of your Windows desktop or by pressing the Wireless on/off switch on laptops that have such switches.
Another Bright Idea: Turn Down The Display
The single component that consumes the most amount of power on your notebook is the screen backlight. This is particularly true for "desktop replacement" notebooks with large screens (15-inch and 17-inch laptops). Yes, displays usually look better when the backlight is nice and bright but when you're away from a power outlet you need to balance your desire for a vivid screen with your desire to keep your laptop running. Start by lowering the screen brightness to the lowest setting and increase it slowly until you reach the dimmest setting you find bearable. Of course, this will vary depending on the room you are in ... you'll have to increase the screen brightness if you're working outdoors under direct sunlight but you might be able to use the absolute lowest brightness setting when you're working on a plane with the cabin lights off.
DVDs Will Leave Your Laptop DEAD
Sooner or later most people find themselves stuck on a flight or in a car without Wi-Fi and nothing better to do but watch a movie to pass the time. Pulling out that DVD or Blu-ray collection sounds like fun but it's one of the fastest ways to drain your laptop's battery. The motor that spins the optical drive and the laser used to read the discs create a huge power draw while the disc is spinning. In addition to the drive, your laptop's processor (and the GPU) has to work hard to decode the audio and video. This usually translates into more than a 30% increase in power consumption compared to when your notebook is basically just sitting idle while you type a document in Microsoft Word. If you must watch movies, try to stick with digital content that you previously downloaded such as iTunes or Amazon Instant Video that has been saved to your computer. You can also stream online from Netflix.com or Hulu.com but, as previously mentioned, Wi-Fi power consumption is something to keep in mind.
In some cases you might be able to turn to an extended battery for your laptop, but as manufacturers race to make thinner and lighter laptops, many of these "ultrabooks" have integrated batteries that cannot be removed or replaced without completely disassembling the laptop. So what can you do to squeeze out a few extra minutes (or even a few extra hours) of battery life? With a few minutes worth of simple changes, you can easily get your work done without constantly looking for the nearest power outlet.
Most of this guide will focus on modern notebooks running Windows 7, but much of the advice below holds true even if you're running Windows XP or planning to move to Windows 8.
Don't Overwork Your LaptopIn the simplest terms, anything your laptop does requires power. Therefore, your laptop is wasting power every time it does something that you don't "need" it to do. One simple solution is to close applications you aren't using rather than leaving programs running in the background or minimized in the Windows taskbar. However, you can go one step further.
Every laptop running a modern version of Windows has the ability change power profiles using the Windows Power Management. Click on that Dell Latitude CPi A Series Laptop Battery icon on the bottom of your screen, and make sure your notebook is set to "Balanced" or "Power Saver" if you want a quick and simple way to limit unnecessary power consumption.
The "High Performance" setting is great if you are encoding video or playing games but it makes your processor and hard drive(s) work harder than they have to, using more power and throwing out more heat. Most notebooks also include power regulation software from the laptop manufacturer (HP Power Advisor, Toshiba Power Saver, etc.) which can be used to help reduce overall power consumption.Being Wireless Will Eventually Leave You Powerless
We usually need our laptops to be connected to a wireless network of some kind; Wi-Fi, 3G broadband, your 4G USB modem, or even your Bluetooth external keyboard and mouse at the office. The problem is that constantly sending and receiving wireless signals drains a significant portion of your notebook's battery. The solution is simple: If you're not actively using a wireless connection then make sure you turn it off. You can disable Wi-Fi or Bluetooth on your laptop either by clicking on the wireless network icon on the bottom right corner of your Windows desktop or by pressing the Wireless on/off switch on laptops that have such switches.
Another Bright Idea: Turn Down The Display
The single component that consumes the most amount of power on your notebook is the screen backlight. This is particularly true for "desktop replacement" notebooks with large screens (15-inch and 17-inch laptops). Yes, displays usually look better when the backlight is nice and bright but when you're away from a power outlet you need to balance your desire for a vivid screen with your desire to keep your laptop running. Start by lowering the screen brightness to the lowest setting and increase it slowly until you reach the dimmest setting you find bearable. Of course, this will vary depending on the room you are in ... you'll have to increase the screen brightness if you're working outdoors under direct sunlight but you might be able to use the absolute lowest brightness setting when you're working on a plane with the cabin lights off.
DVDs Will Leave Your Laptop DEADSooner or later most people find themselves stuck on a flight or in a car without Wi-Fi and nothing better to do but watch a movie to pass the time. Pulling out that DVD or Blu-ray collection sounds like fun but it's one of the fastest ways to drain your laptop's battery. The motor that spins the optical drive and the laser used to read the discs create a huge power draw while the disc is spinning. In addition to the drive, your laptop's processor (and the GPU) has to work hard to decode the audio and video. This usually translates into more than a 30% increase in power consumption compared to when your notebook is basically just sitting idle while you type a document in Microsoft Word. If you must watch movies, try to stick with digital content that you previously downloaded such as iTunes or Amazon Instant Video that has been saved to your computer. You can also stream online from Netflix.com or Hulu.com but, as previously mentioned, Wi-Fi power consumption is something to keep in mind.
2012年5月20日星期日
Bosch to produce own EV batteries: report
FRANKFURT (MarketWatch) -- German automotive technology group Robert Bosch GmbH plans by 2016 to produce batteries for electric vehicles independently from Japanese manufacturers, Bernd Bohr, chairman of Bosch's automotive unit, says in a pre-release of German magazine Focus over the weekend.
By that time, Bosch won't need Japanese technology and knowledge any more, on which today it is still dependent, Bohr is quoted as saying.
In the second half of this year, Bosch wants to bring a lithium-ion battery to the market for the first time, initially intended for marine use.
Earlier this month, Bohr told Dow Jones Newswires in an interview that Bosch is in talks to restructure an automotive battery joint venture with Samsung SDI Co. Ltd. /quotes/zigman/258324/quotes/nls/ssdiy SSDIY 0.00% , and plans to seek partners to build a European supply-base for lithium-ion auto batteries.
Bohr also said in that interview that the company's European automotive customers want a supply source in Europe for advanced automotive batteries used in hybrid and all-electric vehicles.
By that time, Bosch won't need Japanese technology and knowledge any more, on which today it is still dependent, Bohr is quoted as saying.
In the second half of this year, Bosch wants to bring a lithium-ion battery to the market for the first time, initially intended for marine use.
Earlier this month, Bohr told Dow Jones Newswires in an interview that Bosch is in talks to restructure an automotive battery joint venture with Samsung SDI Co. Ltd. /quotes/zigman/258324/quotes/nls/ssdiy SSDIY 0.00% , and plans to seek partners to build a European supply-base for lithium-ion auto batteries.
Bohr also said in that interview that the company's European automotive customers want a supply source in Europe for advanced automotive batteries used in hybrid and all-electric vehicles.
Harper on Phillies: 'Hopefully they don't throw batteries'
PHILADELPHIA (USA TODAY) — Starter Cole Hamels hopes he hasn't created a monster, and beginning today at Citizens Bank Park, his Philadelphia Phillies might discover if they've spawned a rivalry with the Washington Nationals.
"Yeah, I accidentally stirred the pot," Hamels told USA TODAY Sports. "It was unintentional. But that's just the way it happens sometimes. It wasn't like they weren't going to try to beat me anyways."
Hamels hit Nationals rookie outfielder Bryce Harper in the back with a 93-mph fastball in the last game he faced them. Hamels, who revealed that he hit Harper intentionally, was fined and suspended for five games. Hamels is scheduled to pitch against the Nationals on Wednesday.
Harper, 19, seems to know, and relish, what might await him in Philly.
"Hopefully I get a couple boos," he said. "I'm excited to get up there and play. Hopefully they don't throw any batteries at me."
This time, Hamels vows, no one will be purposely plunked.
"It was more of a thing where I wanted to see what the kid was made of," Hamels said. "Then it was like, 'OK, he showed me.' He showed me more than I could ever possibly have known. Obviously it kind of backfired in what I was intending."
The Phillies wound up breaking their seven-game losing streak to the Nationals, but Harper got his revenge by stealing home in the first inning. The Nationals (24-17) come to Philadelphia (21-21) 3½ games ahead of the last-place Phillies, trying to end their five-year reign in the National League East.
"You've got to respect those guys. They are going to be a really good team," Hamels said. "They've got really good players. Rivalries develop when the talent is there and there are good players, not because of hate and animosity.
"And they have some really good players."
The Nationals franchise, which hasn't had a winning season since 2003 when it was known as the Montreal Expos, know it's a sign of respect that the Phillies are taking them seriously in a wide-open NL East.
"There's always tension between both teams," Nationals starter Edwin Jackson said. "You go out and let the actions speak on the field."
Says Phillies general manager Ruben Amaro Jr., "People like to make more about things than it really is and at times less than it really is. We had a rivalry with the (New York) Mets, but that was just because it was a geographical issue, not any more than that. We've had a long rivalry with the Atlanta Braves.
"This is just a case where everyone in the division has a better team and is beating each other up. That's what this is all about."
"Yeah, I accidentally stirred the pot," Hamels told USA TODAY Sports. "It was unintentional. But that's just the way it happens sometimes. It wasn't like they weren't going to try to beat me anyways."
Hamels hit Nationals rookie outfielder Bryce Harper in the back with a 93-mph fastball in the last game he faced them. Hamels, who revealed that he hit Harper intentionally, was fined and suspended for five games. Hamels is scheduled to pitch against the Nationals on Wednesday.
Harper, 19, seems to know, and relish, what might await him in Philly.
"Hopefully I get a couple boos," he said. "I'm excited to get up there and play. Hopefully they don't throw any batteries at me."
This time, Hamels vows, no one will be purposely plunked.
"It was more of a thing where I wanted to see what the kid was made of," Hamels said. "Then it was like, 'OK, he showed me.' He showed me more than I could ever possibly have known. Obviously it kind of backfired in what I was intending."
The Phillies wound up breaking their seven-game losing streak to the Nationals, but Harper got his revenge by stealing home in the first inning. The Nationals (24-17) come to Philadelphia (21-21) 3½ games ahead of the last-place Phillies, trying to end their five-year reign in the National League East.
"You've got to respect those guys. They are going to be a really good team," Hamels said. "They've got really good players. Rivalries develop when the talent is there and there are good players, not because of hate and animosity.
"And they have some really good players."
The Nationals franchise, which hasn't had a winning season since 2003 when it was known as the Montreal Expos, know it's a sign of respect that the Phillies are taking them seriously in a wide-open NL East.
"There's always tension between both teams," Nationals starter Edwin Jackson said. "You go out and let the actions speak on the field."
Says Phillies general manager Ruben Amaro Jr., "People like to make more about things than it really is and at times less than it really is. We had a rivalry with the (New York) Mets, but that was just because it was a geographical issue, not any more than that. We've had a long rivalry with the Atlanta Braves.
"This is just a case where everyone in the division has a better team and is beating each other up. That's what this is all about."
2012年4月23日星期一
Microsoft Applies for Patent on Augmented Reality, 3-D Audio
Surround-sound systems are great for playing games and watching movies when you’re in the “sweet spot” of focused audio. When you’re sitting off-center, however, the audio sounds less like all-enveloping 3-D surround sound, and more like a garbled aural mess.
But now it looks like Microsoft may have a solution. In a recently published patent application, the company describes technology that could solve the “outside the sweet spot” conundrum, providing listeners with a polished 3-D audio experience no matter where they’re sitting, or even standing.
Published Thursday, Microsoft’s patent application describes augmented-reality technology that tracks a user with a “depth camera system” and delivers content-accurate, 3-D audio to the listener, regardless of his or her position in a room. The system collects room and listener position data to deliver specific audio cues — instructions from virtual team mates, gunshots, chirping birds, whatever — inside a user’s unique (and often fluid) soundscape.
This is particularly relevant for Xbox Kinect games, which entail a lot of movement among players. In these games, players continually shift their head and body orientation, which can cause havoc for positional sound accuracy.
read more: Brand New Video Door Phone Intercom System with Three 7" LCD Monitors & Camera
High Capacity Solar Charger and Battery - 20000mAh
But now it looks like Microsoft may have a solution. In a recently published patent application, the company describes technology that could solve the “outside the sweet spot” conundrum, providing listeners with a polished 3-D audio experience no matter where they’re sitting, or even standing.
Published Thursday, Microsoft’s patent application describes augmented-reality technology that tracks a user with a “depth camera system” and delivers content-accurate, 3-D audio to the listener, regardless of his or her position in a room. The system collects room and listener position data to deliver specific audio cues — instructions from virtual team mates, gunshots, chirping birds, whatever — inside a user’s unique (and often fluid) soundscape.
This is particularly relevant for Xbox Kinect games, which entail a lot of movement among players. In these games, players continually shift their head and body orientation, which can cause havoc for positional sound accuracy.
High Capacity Solar Charger and Battery - 20000mAh
Why Is HTC Choosing Phone Thinness Over Battery Life?
Battery life is arguably the number one concern when it comes to choosing a smartphone — even the most feature-packed phones are useless if they’ve run out of power. So why does HTC value device thinness more than battery performance?
At Frequencies, a Seattle press event, HTC’s Bjorn Kilburn, vice president of portfolio strategy, stated that the company decided against making phones with high-capacity — and portly — 3000 mAh batteries in favor of making thinner devices.
The result is evidenced by the company’s HTC One S, the thinnest HTC phone yet. It measures in at 7.8 mm and sports a 1650 mAh battery. The upcoming One X features a slightly larger 1800 mAh battery, and is 8.9 mm thick. (For comparison, the iPhone is 9.3mm thick and has a 1432 mAh battery.)
According to Kilburn, HTC’s consumer research shows people prefer thin smartphones — between 8 mm and 10 mm thick — as opposed to thicker devices with longer laptop battery life.
The HTC research would seem to contradict a recent J.D. PowerOn this week’s episode of the Gadget Lab show, the gang checks out the HTC One S, a wireless speaker called the Soundfreaq Sound Kick, and a handful of really, really cheap gadgets.
First up, reviews editor Michael Calore and staff writer Nathan Olivarez-Giles provide a hands-on look at the HTC One S, a $200 Android phone running Ice Cream Sandwich. The One S, the mid-range model in HTC’s One collection, will become T-Mobile’s flagship smartphone when it launches April 25. It’s got a 4.3-inch qHD resolution screen, and a 1.5GHz dual-core processor.
Next, staff writer Roberto Baldwin joins Michael to talk about a few gadgets you can still afford even if your 2011 tax bill was back-breaking. One is a $4 watch you can get on Amazon. Another, a $10 MP3 player you can find at your local Walmart. Roberto also found a nifty mini digital camera that fits on your keychain (it’s more of a fun novelty than an actual camera solution, though).
Roberto and Michael also announce who the winners of last week’s iPad case giveaway were, so tune in to see if it was you!
To finish this week’s show, Roberto and Michael take a look at the Soundfreaq Sound Kick speaker. It’s a Bluetooth wireless speaker whose battery is designed to last around eight hours. It’s bigger than a Jawbone Jambox, the current leader in the space, it’s half the price of the Jambox at $100, and it has better audio quality.
Like the show? You can also get the Gadget Lab video podcast via iTunes, or if you don’t want to be distracted by our unholy on-camera talent, check out the Gadget Lab audio podcast. Prefer RSS? You can subscribe to the Gadget Lab video or audio podcast feeds. and Associates study that revealed digital camera battery performance as one of the most important factors in overall smartphone satisfaction. Notably, users who are “highly satisfied” with their smartphone’s battery performance are more likely to purchase future phones from the same manufacturer than users who are “less satisfied.”
more tags:
Acer Aspire 5740 Battery
Acer Aspire 5740-5513
Acer Aspire 4736Z Battery
Apple A1175 Battery
Aspire 6920G Battery
Compaq Presario CQ50
At Frequencies, a Seattle press event, HTC’s Bjorn Kilburn, vice president of portfolio strategy, stated that the company decided against making phones with high-capacity — and portly — 3000 mAh batteries in favor of making thinner devices.
The result is evidenced by the company’s HTC One S, the thinnest HTC phone yet. It measures in at 7.8 mm and sports a 1650 mAh battery. The upcoming One X features a slightly larger 1800 mAh battery, and is 8.9 mm thick. (For comparison, the iPhone is 9.3mm thick and has a 1432 mAh battery.)
According to Kilburn, HTC’s consumer research shows people prefer thin smartphones — between 8 mm and 10 mm thick — as opposed to thicker devices with longer laptop battery life.
The HTC research would seem to contradict a recent J.D. PowerOn this week’s episode of the Gadget Lab show, the gang checks out the HTC One S, a wireless speaker called the Soundfreaq Sound Kick, and a handful of really, really cheap gadgets.
First up, reviews editor Michael Calore and staff writer Nathan Olivarez-Giles provide a hands-on look at the HTC One S, a $200 Android phone running Ice Cream Sandwich. The One S, the mid-range model in HTC’s One collection, will become T-Mobile’s flagship smartphone when it launches April 25. It’s got a 4.3-inch qHD resolution screen, and a 1.5GHz dual-core processor.
Next, staff writer Roberto Baldwin joins Michael to talk about a few gadgets you can still afford even if your 2011 tax bill was back-breaking. One is a $4 watch you can get on Amazon. Another, a $10 MP3 player you can find at your local Walmart. Roberto also found a nifty mini digital camera that fits on your keychain (it’s more of a fun novelty than an actual camera solution, though).
Roberto and Michael also announce who the winners of last week’s iPad case giveaway were, so tune in to see if it was you!
To finish this week’s show, Roberto and Michael take a look at the Soundfreaq Sound Kick speaker. It’s a Bluetooth wireless speaker whose battery is designed to last around eight hours. It’s bigger than a Jawbone Jambox, the current leader in the space, it’s half the price of the Jambox at $100, and it has better audio quality.
Like the show? You can also get the Gadget Lab video podcast via iTunes, or if you don’t want to be distracted by our unholy on-camera talent, check out the Gadget Lab audio podcast. Prefer RSS? You can subscribe to the Gadget Lab video or audio podcast feeds. and Associates study that revealed digital camera battery performance as one of the most important factors in overall smartphone satisfaction. Notably, users who are “highly satisfied” with their smartphone’s battery performance are more likely to purchase future phones from the same manufacturer than users who are “less satisfied.”
more tags:
2012年4月5日星期四
Test Comparison: Which Browser Will Make Your Laptop’s Battery Last Longer?
Do you have a laptop or netbook with average or poor laptop battery lifetime? If that’s the case, you might want to use an Internet browser that’s able to take advantage of the power saving features included with Windows 7 or Windows 8. We tested all the major browsers and had some very surprising results. Read on to learn which browser is best at squeezing more time out of your laptop’s battery. Is it Google Chrome? Is it Internet Explorer? Or is it Firefox?The Testing Procedure
For this comparison, I tested all the major browsers: Internet Explorer 9, Internet Explorer 10 beta (included in Windows 8 Consumer Preview), Google Chrome 18, Mozilla Firefox 11 and Opera 11.62. No addons were installed.
I used my two and a half years old laptop - an HP Pavillion dv7 2185dx with the following hardware configuration: Intel Core2 Quad CPU Q9000 @ 2.00 GHz, 6 GB of RAM DDR2, ATI Mobility Radeon HD 4650. This model is marketed as a desktop replacement and ACER Aspire 5740 Laptop Battery time was never its strength, and it is even less of a strength now that a few years have passed. I can barely squeeze two hours of battery time when using it. Therefore, understanding which browser to use, so that my battery lasts as long as possible, was important to me.The tests were made on a clean Windows 7 installation, with all Windows Updates installed and no other software than the browsers being tested. I used the Power saver Power plan. I had to modify its settings so that it did not turn off the hard disk and put the computer to sleep only when the battery reached its critical level.
Since Internet Explorer 10 beta is available only in Windows 8, I used a clean installation of Windows 8 Consumer Preview on the same laptop. The same power plan was used, using the same modifications to its default values as in Windows 7.
The benchmark used was the Peacekeeper acer laptop battery test, which tests your browser until your battery runs down and Windows puts your computer to sleep. I ran this test at least three times for each browser and recorded the results. Some of the test runs were unsuccessful due to various reasons: the Internet connection stopped working for a short while during some tests, Peacekeeper was not able to record the results of some tests while in other runs I encountered browser crashes.
For each browser I recorded the results of three successful test runs and made the necessary averages to make the comparison between results.
Observations: Google Chrome - Very Unstable & Internet Explorer 10 beta - Constant Results
Out of all browsers, Google Chrome stood out as the most troublesome. Most of the tests I made with this browser did not finish successfully. First, I had issues with the browser crashing in the middle of testing. I reinstalled Chrome and the problem was fixed. Then, many tests simply did not end well and Peacekeeper was not able to record the results, for unknown reasons. Also, during most tests, the screen of my laptop was becoming active at random intervals, as if mouse or keyboard movements were detected. I found this strange, as my laptop was simply sitting on a table, not bothered by anyone. This lowered the ACER Aspire 5740-5513 Laptop Battery lifetime when testing Google Chrome, as the screen consumed more energy than in the tests made with other browsers. Again, the cause for this behavior is unknown and it was encountered only when testing Google Chrome.I noticed that Internet Explorer 10 beta had the most constant results. The variations between tests were extremely small, both in terms of the average performance score and how long the APPLE A1175 battery lasted. For example, the difference between the best and the worst result was only of 4 minutes. The least constant browser was Mozilla Firefox. The difference between the worst and the best test result was 21 minutes.
All browsers, except Google Chrome, ran the tests without any major issues and were very stable in their behavior.
Test Results: Internet Explorer Delivers the Most Battery Lifetime
Below you can see the averages of the results I obtained during my tests.
If you want to choose the browser that gives you the maximum battery lifetime then your best bet is Internet Explorer 9 or 10, depending on the operating system you are using (Windows 7 or Windows 8). Both browsers had very similar results, delivering an average ACER Aspire 4736Z battery lifetime of 108 minutes and 104 minutes respectively.
If you look at the average performance score, the winner is Google Chrome, by a huge margin (126% better) when compared to Internet Explorer 10. However, you get the worst possible battery lifetime out of all browsers (21% lower). It seems that Google Chrome doesn’t take advantage of the power saving features included with Windows 7 and maxes out all the resource available.
However, if you want a mix between browsing performance and battery lifetime, your best choice is Opera. Opera was always close to Internet Explorer 10 and 9 in terms of Presario CQ50 Laptop Battery lifetime (only 7% lower) while delivering browsing performance that’s 78% better.
Conclusion
If I were to pick the winners, they would be Internet Explorer and Opera. Depending on what matters most to you, they are your best choice while browsing the web in battery mode.Before you close this article, please share your experience with using different browsers while running on Laptop batteries for Dell Latitude D500. Are the results above similar to what you have experienced?
Comments
I never see a comparison
Profesor Yeow (not verified) - Mon, 04/02/2012 - 23:00
I never see a comparison about the PA3465U-1BRS battery of a laptop from the point of view of browser. Good guide! Thanks!
(I use opera)
(I use opera)
I tend to agree with
mad.madrasi (not verified) - Tue, 04/03/2012 - 09:58
I tend to agree with @john3347. No other browser, especially FX or IE have anything like 'Googleupdate' which constantly runs in the background. Without shutting it off, say by using MS Autoruns or any other, will not give the correct picture, technically. But in real life, your test results offer good guidance. Good work.
That said, I suspect 99% of people run Chrome with Gupdate on and don't disable it. I do it as I still use a 7 year old 845GLVA with Celeron 1.7 and 1GB of DDR1. BTW, even though I have a legal copy of Win7, I can't install and use it in this home PC because win7 doesn't recognize the 845GLVA MB onboard graphics card and the MB doesn't have a PCI-E slot!
:-(
That said, I suspect 99% of people run Chrome with Gupdate on and don't disable it. I do it as I still use a 7 year old 845GLVA with Celeron 1.7 and 1GB of DDR1. BTW, even though I have a legal copy of Win7, I can't install and use it in this home PC because win7 doesn't recognize the 845GLVA MB onboard graphics card and the MB doesn't have a PCI-E slot!
:-(
I did a test of my own after
Renji (not verified) - Tue, 04/03/2012 - 15:07
I did a test of my own after reading this. On my year old HP laptop, running Windows 7, I was able to get around 3 hours running Google Chrome 19 and billy music player in the background. With Opera I got close to 3½ hours. All other background apps, WiFi and Bluetooth were disabled.
Hi, thanks for the
VirGnarus (not verified) - Tue, 04/03/2012 - 18:03
Hi, thanks for the informative study. However, in the interest of improvement, I'd like to point out that there's a flaw with including IE10 in this test set.
Win8 has more than just certain registry tweaks and settings to differentiate it from Win7 in terms of power management. There are fundamental differences in the OS design and structure that were intentionally done to improve power usage, given that Microsoft's intent on Win8 was to use it to help penetrate the tablet market. No amount of registry editing and fiddling with power management settings will change this. It may look similar to Win7 on the outside, but internally there's been a good number of alterations.
Because of this, IE10's power management improvements do not stem so much from IE10 itself but rather from the OS it is built and running on. To include it in the test set without testing the other browsers in the Win8 environment is akin to saying, "Opera on Linux uses less energy than IE9 in Win7, therefore Opera is superior to IE9." Even if you do decide to run the other browsers in the Win8 environment, it'll be evident they - being designed for Windows 7 - will not be able to take advantage of the new OS as much as IE10, which is designed specifically to cater to Win8.
It's up to you, but I personally recommend adding IE10 merely as a side note or an extra to give people an idea how Win8 also improves power management, but not to include it in the original test set.
Win8 has more than just certain registry tweaks and settings to differentiate it from Win7 in terms of power management. There are fundamental differences in the OS design and structure that were intentionally done to improve power usage, given that Microsoft's intent on Win8 was to use it to help penetrate the tablet market. No amount of registry editing and fiddling with power management settings will change this. It may look similar to Win7 on the outside, but internally there's been a good number of alterations.
Because of this, IE10's power management improvements do not stem so much from IE10 itself but rather from the OS it is built and running on. To include it in the test set without testing the other browsers in the Win8 environment is akin to saying, "Opera on Linux uses less energy than IE9 in Win7, therefore Opera is superior to IE9." Even if you do decide to run the other browsers in the Win8 environment, it'll be evident they - being designed for Windows 7 - will not be able to take advantage of the new OS as much as IE10, which is designed specifically to cater to Win8.
It's up to you, but I personally recommend adding IE10 merely as a side note or an extra to give people an idea how Win8 also improves power management, but not to include it in the original test set.
The issue is that it doesn't
VirGnarus (not verified) - Wed, 04/04/2012 - 16:41
The issue is that it doesn't have a level playing field for all of them, with IE10 being isolated to a completely different OS. If the other browsers were also tested in Win8 that would be another thing, but you make no mention that you conducted that in your study. Furthermore, you stated that IE10 was the best browser to use for Windows 8, without presenting tests on the other browsers in Win8 to validate that statement.
Your attempt may have been to display IE10 separately from the rest in that it involves Windows 8, but it is very difficult to get that vibe from your article. It's just the way you presented it that made it appear like it was playing at the same level as all the other browsers. I would just recommend clarifying your intent of adding IE10 into it and explain that there's more behind IE10's power-saving performance than just the browser itself, to prevent people from being unintentionally misled.
Your attempt may have been to display IE10 separately from the rest in that it involves Windows 8, but it is very difficult to get that vibe from your article. It's just the way you presented it that made it appear like it was playing at the same level as all the other browsers. I would just recommend clarifying your intent of adding IE10 into it and explain that there's more behind IE10's power-saving performance than just the browser itself, to prevent people from being unintentionally misled.
Another browser war is
mad.madrasi (not verified) - Wed, 04/04/2012 - 21:06
Another browser war is brewing. /LOL/ I broadly agree with @virgnarus. But to defend @ciprian, I don't think he suggested that IE9 or 10 is the 'best' browser for a Win system. I think what this study and @ciprian suggests (or what I believe they suggest) is that IE9 seems to be the 'least' power consuming browser on a Win system.
To put my 2 cents in - the day is long past when a browser is being used just for browsing. In today's world a browser is much more than that. With the way shown by Firefox in its awesome power with extensions, and Chrome too, they are sure to consume much more than, if I may say so the 'lame' IE.
That said, in an old laptop on its last legs, @ciprian's study does indicate that IE9 is the way to go, if and that is a major if, you don't have a way to re-charge the laptop on the go.
Frankly, for us in the 3rd world, it is a good piece of benchmark. In an emergency, even with a modern laptop, if there is a probable chance of being unable to recharge for some time (it does happen, as when the Tropical Cyclone THANE hit near Pondicherry, and large swaths were left without power for days), we should forget about the jing-bang of other browsers and fall back to IE.
To put my 2 cents in - the day is long past when a browser is being used just for browsing. In today's world a browser is much more than that. With the way shown by Firefox in its awesome power with extensions, and Chrome too, they are sure to consume much more than, if I may say so the 'lame' IE.
That said, in an old laptop on its last legs, @ciprian's study does indicate that IE9 is the way to go, if and that is a major if, you don't have a way to re-charge the laptop on the go.
Frankly, for us in the 3rd world, it is a good piece of benchmark. In an emergency, even with a modern laptop, if there is a probable chance of being unable to recharge for some time (it does happen, as when the Tropical Cyclone THANE hit near Pondicherry, and large swaths were left without power for days), we should forget about the jing-bang of other browsers and fall back to IE.
Personally I went from IE8 to
mad.madrasi (not verified) - Tue, 04/03/2012 - 20:33
Personally I went from IE8 to FF (about 4 years back) to exclusive Chrome (for last 2 years or so). Can't even think of IE except in an emergency because my home PC is still stuck on WinXP & IE8 with attendant security holes.
But here is a nice youtube video on the subject - if nothing else the lyrics and the music is great and good 3-1/2 minutes of fun. I guess even @ciprian would have a laugh at this.
But here is a nice youtube video on the subject - if nothing else the lyrics and the music is great and good 3-1/2 minutes of fun. I guess even @ciprian would have a laugh at this.
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