x526 only charging from usb not from charger

[lowrider2025]

I had my x526 get very hot while charging. Had to let it cool down a long time. Then it had red blinking light. Ultimately could turn it on again. But now it's only charging from usb port from laptop/pc, not from wall charger...

Any ideas/solutions ?
Thx

 

[lowrider2025]

defective/damaged charger flex cable ?

 

[lowrider2025]

It's gone from bad to worse. Was fully charged, turned the phone off. Turned it back on...only about 15% left. Must be bad battery quality. Now once again the red light or blinking red light. I think it's some kind of protection when a bad battery is detected....