[karthikrr]

To add, I just connected the charger to it. The device was at 50%. In literally 5 seconds, I watched the battery meter change to 62%, and now it appears to be charging at the rate of 2% per minute.

I am curious, how does the "meter calibration" thing work? I mean, what are the odds that somehow the software is reading the battery status so incredibly wrong that it just jumps around?

My theory at the moment - when it says 70%, for example, its not really at 70%, but much lower. When it sits at 96% for more than an hour, that is because the meter went to 96% while the battery wasn't really at 96%, and so now the meter is waiting for the battery to catch up. If this is right (and I still don't know how the readings work), then when it hits 100%, that is when the battery is actually truly at 100%, and "calibrating" it will retrain the meter to read the status correctly.

This seems a necessary exercise, IF the software is designed to shut down when the meter reads below a certain threshold. Might also explain why the previous owner might have believed he had enough juice and started the update and the device turned off suddenly.