Question Elitebook 820 G1 turns on automatically when plugged

[SDavid]

My Elitebook 820 doesn't turn on. And if I plug it, it turns on automatically and off when unplugged despite showing 94 Percent when plugged in. It also shows CMOS invalid and later reboot when pressed enter enter or sometimes by it self

 

[mike_coreit]

It sounds like an issue with the battery