I have the same problem with battery. Battery is charging and it’s operational but I have no charg led on the side and any battery indicator in Linux or Windows. Nothing helped so I opened back cover and unplag and plug battery few times. It seemed to fix it for few days until today when battery was completely drained. I tried the same and it seems to work but if I leave the laptop unplugged for more then few minutes same thing happens (no battery indicator, no battery charge led) is there anyway of fixing it?