Quote:
Originally Posted by taustin
That was good (and necessary) advice for nickle cadmium batteries. Lithium Ion batteries, however, do not have the charge memory issues, and this is not necessary.
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Actually in this case it is not about the battery's memory. It is about allowing Android to better understand what is empty and what is full so that it can better guess the current level. In the end, there is no clear report from the battery that "now I am at x%". The software will try to guess based on tiny changes in the voltage.
Now, this can be useful to be done each time you do a full wipe of your device (including the battery stats) or you write a new ROM (operation which wipes the stats).
Anyway, this is not necessarily giving you more battery life but it is actually improving the chance that when you see 30% left it is really 30%. Otherwise, you might see 10% left and start charging when you actually have a lot more juice left.
In my experience, what is draining the battery is either WiFi or some app not allowing Android to go to sleep (WAKE_LOCK). This (the app part) can be for various reasons: badly written, trying to refresh the data (from web for example) too often, bad implementation of error scenarios (for example, at work I have a WiFi which does a redirect on the first attempt to access a page in the browser and I have to give some credentials; if I connect to WiFi but do not give the credentials, Google services are continuously trying to sync and will not allow my device to sleep at all - which depletes the battery in few hours - I saw this on my phone, not on my Nook STR, I always turn WiFi off on Nook).