phone was coming on and off when charger plugged in.

Hi,

- Try with another battery

- Try with another charger (not with the laptop USB)

- Clean the battery connectors on the phone

- Try to charge the battery externally

If you phone switch-on normally with other battery but again have a problem with the charging, then you have a hardware problem. This can be broken USB connector, charging line on the mother board or charging i.c.

If you phone can't switch-on, try to enter in the Android Recovery menu and reset it, or try to flash it with Odin. But if you phone can't enter in the recovery mode (Home + Volume Up + Power) or Download mode (Volume Down + Power) you have a hardware problem with the mother board. For this operation you must use a fully charged battery.

Regards.

my phone is a coolpad and evey time i put any charger it wont work is my battery damage

and it turns off and on

My phone was on the charger and it was going on and off and when I wake up in the morning my phone is on 2% what do I do?

J8 automatic switch on

Replace you battery.Galaxy S4 Battery

This sounds like you have a bad charge port. It’s possible it’s the battery but most likely, it’s the charge port. As with any electrical component on a phone, they can just fail. It’s also possible that at some point in time, there has been physical damage done to the charging port. Does the charge cable feel snug in the port? If it feels loose there could be something in the charge port that is causing you to have a poor connection. You can try and clean out the charge port with a toothbrush or a small pair of tweezers. Just be careful when you do this. If you have the ability, I would also try a new battery and see if that makes a difference. Before you go though the hassle however, have you tried a different cable with a different power brick?