"Not charging" with old and new battery and with different chargers
MBP 13” Early 2011 2.3GHz i5 model
Why did I change battery: I used my MBP as a ‘power bank’, powering off a raspberry pi and let it run flat. It wouldn’t take a charge anymore.
When I tried to charge it the connection light would just stay green and refuse to charge. Pressing the battery indicator simply blinks (one light). This battery has already been replaced with a third party battery on 24th Jan 2017. Fine, I thought it has been a while since so I ordered another one.
Connected the new one. Bravo. 100% on the battery indicator. Left it on sleep mode connected to charger. Turned the mac on, realised the battery showed 76%. Weird. It’s not charging. I tried to clean the magsafe connector, reseat the battery, tried reset PRAM, SMC, restarted etc. And only once did the magsafe charger turned orange. I came back 5 mins later and it was green again, the charge was dropping yet again (50%).
I tried to charge with my MBA adapter, still green.
This MBP was never in contact with water and predominantly used in clamshell mode for years.
This MBP can run fine when I do the battery-bypass start up. (hold down power button, then connect magsafe and it goes max fan)