Could be that some app drains the battery while you are charging. What do you do while you are charging.
-i am not doing anything while i am charging, however, if this makes any sense, i was playing games, suchs as summoners war, zenonia s, clash of clans until the battery goes less than 10%. i’ve also thought about apps draining the battery. i’ve read on a different forum that the charge might be low while the apps running consumption is high; but honestly, im not doing anything while im charging. in fact, i clean all background apps before charging. i even run the security cleaner before charging. there is no specific time of condition that the phone wont charge properly. it says charging then when the screen locks after 2 mins, it wont charge, sometimes it does. no pattern at all.
Did you try to charge the phone in aeroplane mode or when it’s powered-off? - no i have not. should i? if yes, that would be a bit of hassle.