My Macbook pro has to charge overnight to get an even usable charge (usually 50%), and when I unplug the charger from it drops to around 1-6%. I just replaced the battery and coconut app says its fine, charging with enough watts, etc. Have no idea what is going on.

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Edit: should note, it only charges when off. When its on it claims its not charging. Unplugging the charger while its on causes it to drop or completely turn off.

  • 2
    Bring it back to wherever you bought it and have it checked (you should still have warranty).
    – nohillside
    Oct 24, 2021 at 14:48
  • Have you try a Reset SMC : support.apple.com/guide/mac-help/… ?
    – user415185
    Oct 24, 2021 at 15:15
  • I’ve tried the SMC Reset but it doesn’t help.
    – trish kate
    Oct 24, 2021 at 15:24
  • 1
    Welcome to Ask Different -- RE: "I just replaced the battery" -- Did you replace the battery or did you take it to a service center? If the later, take it back. Otherwise take it to have it serviced, as I seriously doubt there is anything that someone here can do for you. Oct 24, 2021 at 15:31
  • I replaced the battery myself, and it claims the battery is fine but is there any way the charger ports could have a problem? Or something internally that needs to be cleaned?
    – trish kate
    Oct 24, 2021 at 15:42

1 Answer 1


Logically, there are three possibilities:

a) the charger is faulty
b) the power management unit is faulty
c) the battery is faulty

The charger is the easiest to test: see if you can find another Magsafe 2 charger.

Realistically, the other two need to be tested by an Apple Store or other authorised/qualified technician.

Apple don't sell replacement parts to the public, so any battery you bought will be a third-party attempt to match the specification (within costs). Printed text saying "Designed by Apple" etc is unlikely to be a guarantee of anything.

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