New battery won't fully charge

I bought a new battery from iFixit and replaced my old battery, and now, despite calibrating the battery 3 times, resetting the SMC and PRAM, it won't charge past 90%. If I unplug my computer soon after the level says 100% and my charger is green, it drops down to 89%. If I leave it charged for a couple hours afterwards, it will eventually charge, and will discharge normally, but I have no idea of knowing when it's fully charged (both System Report & coconut battery say it's fully charged at that point).

While my old battery wouldn't last as long as it had before (the Genius Bar said it was functioning at 60%), I never had this issue with it, which is why I assume it must be something with the new battery and not another part.

Any ideas would be much appreciated, I've done everything I can think of.


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I suggest emailing after sales support at and explaining your issue. They should know and be able to help you out. It they determine it is faulty, they'll replace it for sure if this is still under warranty.

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