android charging speed without any app,actualy some people have flight-mode or airplane mode on their phone especially android users and some phones but they dont know the uses of those
modes.
1. Whenever you are running on a low battery,put your phone to airplane mode or flight mode and plug your phone on charge. your phone will charge much faster than before even your phone battery may full within 30 minutes
NOTE : flightmode or airplane mode saves your battery 75% when your battery is getting low.
pls feel free to ask questions using the comment box below.