Does that mean I'm not supposed to turn on the macbook for the first time at all and the battery is going to discharge by itself to 0%? I don't believe the battery can drain to 0% after one night sitting in a turned off macbook, right? The second part of the instructions "then charge it to 100% and drain it again until your MacBook Pro shuts down automatically. For example the first part says "allow it to drain overnight". The calibration instructions aren't entirely clear to me. 57% of charge and I continued discharging the battery by using the macbook and then I thought maybe I'm following the instructions wrongly. Now I installed the 2nd new battery and turned the macbook for the first time on and it showed ca. I explained all of this in detail (including coconut battery screenshots) to the customer service and they send me a new battery saying the one I received was damaged. I tried everything including SMC and PRAM reset but the macbook stopped going into hibernation mode. When I turned on my macbook after the replacement it showed a charge of 59%, then I used the the macbook until it turned off automatically, but the problem was it didn't go to hibernation on about 5% as usually, but it suddenly turned off on about 18% and all work in progress was lost. ![]() "Calibrate your battery before using it: allow it to drain overnight, then charge it to 100% and drain it again until your MacBook Pro shuts down automatically. ![]() I bought a replacement battery from ifixit and installed it, then I followed the instructions:
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