Chosen Solution
Hey there, I got a problem with my Macbook Pro Mid 2012 recognizing its battery. At some point while using it it suddenly shuts down and won’t start again unless I plug in the power adapter. In this case system stats show that the battery is not being recognized. My first attempt of solving this problem was to pop the bottom cover off, disconnect and reconnect the battery cable from the logic board - pop the cover back on and suddenly it starts working again as if nothing happened. Unfortunately not for very long periods of time. Sometimes hours, sometimes days. This behaviour is very consistent. It shuts off, I reconnect the battery, it starts working again for a limited period of time, it shuts off again and so on. Then I ordered a new battery, the old one was kinda weak anyways. But the new battery didn’t solve the problem either. Here are some coconut battery stats (this is with the replacement battery) directly after the disconnect reconnect game.
Some more information about the history of this laptop: I bought it used and non functioning from a friend (suddenly stopped working and won’t turn on again) for a very low price so I tried my luck, sent it to a repair company in Berlin to have them have a look at the logic board. They replaced the display cable and the charging electronics (that’s how they called it on their paper). I didn’t mind cause I got a working macbook for a good price including the repair that lasted me about 4 years until now. I put in more RAM and a SSD and for some time I used a SATA3 adapter to use an additional HDD instead of the optical drive. sooo… Any help how to proceed further will be much appreciated :)
I wish I could be helpful but there’s not much to work on here. Battery data are more than good and a repeated behaviour with two different batteries points to the logic board. There’s not much one can speculate without going through schematics and thorough testing..probably something along current sensing but it wouldn’t be a typical DIY repair.
Does the issue go away with the original battery installed? If multiple batteries are behaving in the same way, the issue is most likely not with either battery, however if you’d like to try another replacement battery, you can contact iFixit’s Customer Support and provide them with the order number and the same details provided here. Your issue could be a caused by a few other components, namely the logic board, MagSafe board, or could even be a software conflict. To rule out software as a cause, you can try performing these steps to see if the issue goes away: Repair and verify Disk PermissionsIf you are running MacOS El Capitan or newer (MacOS 10.11+), please follow this guide instead of Step 1Reset the NVRAM/PRAMReset the SMC Otherwise, if the issue persists after performing these steps, then the issue could very well be other hardware. I hope this helps!
