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1 I would like to ask does anyone knows, what is the voltage of a fully charged battery? Lithium-ion cells are typically charged to 4.20V. The Nook HD+ uses that value, too. Nominal voltage is 3.7V. I forgot the cut-off voltage that the HD+ uses ...
1 Just wondering how do you charge the battery externally? By opening the tablet, removing the battery, and connecting it to a dedicated Li-ion charger, of course. Something like this - but that's just an example, that model would not work. You'd...
1 To prevent any misunderstanding: you should definitely not discharge your lithium-ion based batteries to 0% all the time. Li-ion batteries live longer if they are kept between 40% and 80% charge. At 80% you won't get the full capacity / runtime, o...
1 You cannot calibrate batteries in Android. Those silly apps just delete batterystats.bin and that is an Android file responsible for the statistics seen in your third screenshot. It gets deleted automatically when you unplug the charger at an almo...