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After your battery is properly positioned and installed, peel off and discard the clear plastic liner from the top.

Make sure the liner doesn't accidentally pull off any of the black battery component coverings. If needed, use tweezers to hold them in place as you peel off the liner.

Calibrate your newly installed battery: charge it to 100%, and keep charging it for at least 2 more hours. Unplug and use it normally to drain the battery. When you see the low battery warning, save your work, and keep your laptop on until it goes to sleep due to low battery. Wait at least 5 hours, then charge your laptop uninterrupted to 100%.

If you notice any unusual behavior or problems after installing your new battery, you may need to reset your MacBook's SMC.

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