Battery shows 0 mAh capacity after replacing a cell
Hi guys,
I have a MacBook Pro 2012 (non retina) with a swollen battery. The battery still worked fine, holding some charge for about an hour, but I decided to fix it.
I opened the battery, discarded the swollen cells, and replaced them with healthy cells from a donor battery from another MacBook Pro 2012. I checked all six cells with a LiPo charger, and they all hold >90% of the original capacity, so they are very good. I charged all cells individually, double checked all connections, and soldered everything together. A multimeter shows 11.1 V at the battery terminals, so far so good…
Unfortunately the MacBook Pro does not power up with this refurbished battery. It boots with the power adapter connected though. Both MacOS and CoconutBattery recongise the battery serial number, manufacturer, age, and so on, but show 0 mAh and the Mac does not charge or use the battery. As soon as I remove the power cord, the MacBook Pro shuts down.
I have reset SMC and made no difference.
Any clue of how to fix this?
UPDATE 02/10/2021
CoconutBattery snapshot
crwdns2934109:0crwdne2934109:0
crwdns2944067:02crwdne2944067:0
Let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see Adding images to an existing question
crwdns2934271:0crwdnd2934271:0 Dan crwdne2934271:0
@danj Question updated with a CoconutBattery snapshot.
crwdns2934271:0crwdnd2934271:0 Alreiber crwdne2934271:0