Chosen Solution
My macbook pro mid 2012 laptop wont turn on without connecting a charger. Battery health at 90% and charging fine checked with battery health app, but when i disconnect the charger macbook will off immediately.
Is it possible to repair the fault with battery or do I need to replace the battery. Also suggest me a good battery to buy. I tried using another macbook pro battery. with that battery laptop works fine.
Sadly you really can’t fix the battery as you likely have a bad cell. Here’s the needed part MacBook Pro 13" Unibody (Mid 2009-Mid 2012) Battery
