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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

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New battery isn't charging

I recently installed my replacement battery and now my laptop doesn’t work without being plugged into the charger. I can’t even show the battery life indicator. Every time I check the box to enable it, it uncheck itself. Please help!

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Let’s do some testing of the battery. Complete the guide below; be sure to upload a screenshot of the coconutBattery window to your existing question!

How to Test a Mac Laptop Battery

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Jerry Christian will be eternally grateful.
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