I was chatting with a friend, then it suddenly turned off. I knew something was wrong, because it wasn't even near 4% yet.
Plugged it to the charger and couldn't turn it on before waiting at least 10 minutes. When I turned it on, I took the cable off and quickly opened an app to show battery stats. Something caught my eye.
With 17%, the battery had almost 3000mV, and that was really weird (I've heard it should be around 3370mV at this percentage).
What should I do? Calibrate my battery is a choice?