Actually did your phone drain complety so charging light wont turn on? you said phone has been dead for about 3 or 4 days.. mine went to charger as soon as i got home but i need to know if you had drained it completly and charging light was off before turning it on?
See the pictures I attached above. Since turning off on Friday (when the battery was at about 90-95%), it's been in a very steady decline (the battery app logged all this info, even though the phone was in a zombified state).
Right when it was at about 5 or 10% capacity (totally unbeknownst to me remember, pure coincidence), I plugged it into the laptop as a last resort. It continued draining from there for about an hour, despite being plugged in, and I had basically given up all hope, until it finally hit Zero, or what is basically Zero. I reckon
then is when the phone rebooted and began slowly recharging.
It then took another 20 or 30 minutes for the phone to actually BOOT, as prior to this, it was just a charging screen and a blinking red LED, and I couldn't actually turn the phone
on.
I'm not sure what would happen if you let the phone totally drain, without it being plugged into any sort of outlet. The battery might be completely dead after that.
But because we know the phone did not draw any power when it was discharging, you may as well have it plugged in and wait for it to drain at which point it'll be caught by the power input and begin to recharge.