battery-life posts

Filed under: Surveys and Polls, Apple, iPhone

3GS has 99% satisfaction rate, AT&T not so much

by Mike Schramm (RSS feed) on Aug 18th, 2009

A recent customer survey (of only 200 customers -- what are these surveys getting away with only 200 respondents?) claims that the iPhone 3GS has a 99% satisfaction rate. A full 99% of 200 polled iPhone customers claim that they are satisfied with their purchase, while 82% of them claimed they are "very satisfied." That's higher than previously, too: previous versions of the iPhone got a 73% satisfaction rating. You're probably not surprised by this, but guess what? People love their iPhones.

What don't they love about them? 8% said the phone wasn't compatible with their company's IT infrastructure. 41% still say the battery life isn't long enough for their tastes. And a little company called AT&T has drawn the most ire: 55% of respondents say the AT&T network was the worst feature of the iPhone 3GS. So there you go. This just in: ten of eleven Twitterers I just surveyed do like ice cream. That survey is probably just as shocking as the iPhone one, which is not much.

Still, quite a deal Apple has. Your product has almost unanimous satisfaction from customers, and the worst thing about it... is the fault of a completely separate company. Good deal indeed.

Tags: apple, atT, battery-life, customer-satisfaction, iphone, iphone-3gs, it, obvious-research-department, product, survey, unanimous

Filed under: Analysis / Opinion, Software, Apple, iPhone, App Store, iPod touch

Rumor: Apple working towards putting background processes on the iPhone

by Mike Schramm (RSS feed) on May 18th, 2009

Apple's push notifications sure are neat, but they aren't the brass ring for developers on the iPhone. That, so far, would be background processes. And while Apple has said that background processes would just be too much of a drain on the iPhone's battery, that doesn't mean they don't want them, too.

Ars Technica reports that Apple is still trying to figure out a way for certain apps to do it. There's two options laid out here: one is user-based, in which the user actually approves certain apps to run in the background, with the consequence (if you do choose to enable that) of lower battery lifetime. The second has Apple approving apps for background action, allowing certain developers to run based on limits of "resource usage such as RAM or network bandwidth."

Obviously, there are pros and cons to each plan -- giving the power to the user means they will be able to choose when the battery is drained (on a particularly busy day, for instance, or when the iPhone is plugged in), but it also means that users will have the ability to crash their own phones (allowing too many background processes could cause issues). And of course, while leaving the choice in Apple's hands will make sure background processing is only used in the "right circumstances," we all know how great Apple is at app approval.

Ars concludes on the same point that I would: if background processes are really going to make a difference, they'll likely rely on a future iteration of the iPhone, as the one we've got now is just not built to run apps all the time, no matter who chooses them. Even if Apple is working out a way to run certain apps in the background, they are almost certainly spending more time beefing up the iPhone hardware as well.

Tags: apple, ars-technica, battery, battery-life, iphone, network-bandwidth, push-notification, ram

Filed under: Hardware, Portables, iBook, PowerBook, PowerMac G5, Macbook Pro, MacBook, MacBook Air

Battery calibration recommended by Apple, why no utility?

by Jason Clarke (RSS feed) on Jul 30th, 2008

Like virtually all mobile computer manufacturers, Apple recommends that users calibrate their laptop batteries every few months, as Scott pointed out a couple of years ago. Unlike many manufacturers, however, Apple does not include a utility to automatically perform a calibration. Given Apple's uncanny ability to make things user-friendly, this seems like a bit of a glaring oversight.

What are the benefits of calibration? Primarily the goal is to ensure that the microprocessor in your battery provides an accurate estimate of how much time you have left on the battery. Over time it can lose track of just how much juice your battery has in it, and calibration gives it a very accurate reading on the battery's health.

Older battery technologies also benefited from a process called conditioning, which was typically performed the same way as a current battery's calibration process. In a nutshell, you fully charge the battery, fully discharge it, then fully charge it again. It's unclear whether modern lithium batteries gain anything in an actual capacity perspective from this process, or if it is simply a calibration of the microprocessor for the purpose of providing accurate time estimates.

Continue reading “Battery calibration recommended by Apple, why no utility?”

Tags: battery, battery-calibration, battery-conditioning, battery-life, calibration, coconutbattery

Filed under: Software, Hacks, Tips and tricks, Apple, iPhone

Extending your iPhone's battery

by Mike Schramm (RSS feed) on Jul 23rd, 2008

IntoMobile has a few good tips on how to extend your iPhone's battery life, and most of them involve the most obvious thing you can do to keep your iPhone running: cut down on any and all extra functions. They actually recommend to turn off 3G, but you don't have to go that far -- just by holding down the Home button, you can close any background applications sucking up juice. And by resetting your phone, you can do the same thing -- clear out anything running that you're not using.

Actually, while I was in Los Angeles last week, I heard the great Leo Laporte mention a great tip on his radio show: turn off the "Ask to join networks" feature in the WiFi settings. If you're like me, you almost always know when there's a WiFi network around that you can use on your iPhone, and so it's pointless (and a waste of battery life) for the iPhone to be constantly searching for one. You can always flip it back on if you do want to do a little poking around, but leaving it off will significantly help battery life.

In fact, when in extreme trouble, you can go even farther and just switch the whole thing into Airplane Mode. It'll make your phone useless, but when you really need it -- out on a trip, or waiting to make an important call -- the extra battery time might make all the difference.

[via Apple Enthusiast]

Tags: airplane-mode, battery, battery-life, button, extending, home, iphone, ipod-touch, plug, tips, tricks

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