liwen · Jan 14, 2012 at 07:38 am

Google Engineer Debunks Myth: Wiping Battery Stats Does Not Improve Battery Life

There you have it, in the title. Google engineer Dianne Hackborn, who has previously explained Android’s hardware acceleration, took to Google+ again to clarify some myths about the Android operating system. This time, it’s a point of common advice that you’ll see in virtually every FAQ thread about custom ROMs and flashing: wiping battery stats in order to improve battery life.

The reasoning behind that piece of advice was something like this: If you, at some point, did not charge your Android device fully (for example, only to 80%), it would supposedly remember that battery level as “fully charged” – in this case, you’d only ever get to use 80% of your battery, which is of course less than optimal. So, if you wipe the battery stats, usually done in ClockWord Mod Recovery, the device would “forget” the previous level, here 80%, and instead charge to the full 100% once again, thereby re-calibrating the battery. Or, as Hackborn puts it in more technical terms:

The battery indicator in the status/notification bar is a reflection of the batterystats.bin file in the data/system/ directory.

However, as she explains, that’s not the case. Because those battery stats, stored in the batterystats.bin file, are only used to maintain information about what is using the battery when not recharging. That is, it essentially holds the information displayed in the Settings > Battery screen. Nothing more, nothing less. Thus:

It has no impact on the current battery level shown to you.

It has no impact on your battery life.

What’s more, you’ve probably noticed that the battery usage data is reset once you recharge your device anyway. From this you can correctly deduce that the battery stats are wiped as well – every time your device is recharged. More or less every day. If there was any effect, you would’ve noticed it without going into recovery and doing that stuff. Typical placebo, eh?


_________
Want something on the XDA Portal? Send us a tip!

liwen

liwen is an editor on XDA-Developers, the largest community for Android users. View liwen's posts and articles here.
Tomek Kondrat · Apr 1, 2015 at 10:11 am · no comments

Hi Locker to Help You With Lockscreen Headache

The lockscreen is a part of the OS that we see hundreds of times every day, whether we're using Android or iOS. The look of the lockscreen depends on the Android version, device manufacturer or ROM chef. In short, it differs for almost every user. Luckily enough, users can use third party alternatives that bring more features. One such application is Hi Locker, developed by XDA Senior Member thotran7989. Hi Locker can be found both on the Play store and...

XDA NEWS
Jimmy McGee · Apr 1, 2015 at 07:00 am · 2 comments

Must Have App Review: Spider Squisher Pro Extreme

Here on XDA TV we have a series we like to call Must Have Apps. These are apps that we think are so great and useful that you must have them. We’ve given this title to such programs as Pushbullet, Light Flow, Helium, the AROMA File Manager, ROM Toolbox and Pocket Casts. But today we have an app that surpasses them all. Former XDA TV Producer Adam Outler offers up a must have application. In this video, XDA TV Producer...

XDA NEWS
Aamir Siddiqui · Apr 1, 2015 at 04:30 am · 2 comments

OnePlus DR-1 Quadcopter Drone Available for Purchase

OnePlus has been teasing a new product for a while now, hailing it as a game-changer which isn't a tablet or a smartwatch. While speculations were rife about what this game-changing device could be, the company did confirm that the product was indeed a drone in their recent AMA. A tweet and vine from OnePlus shed some more light on this product, which was confirmed to be named as DR-1 (dr-one, get it?) and was to reach stores "next month". In a...

XDA NEWS
Share This