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I ordered a battery several weeks ago and everything had been working fine. But last night, I left my mac charging and this morning woke up to see that the battery had not been charged. It is still at 86%, where it was last night. When I click on the battery icon, it says that, “Battery is not charging”. The power source is the power adapter. The battery has 5 cycles on it and the condition is Normal. This is the second issue within the month that I’ve had with this battery. Very frustrating. How can I resolve this issue? Is this a defect of the battery?

Hello xcelr8t, The most likely issue is a defective battery, or a non-properly connected flex cable. When you are installing the battery flex cable, you don’t want to push on the center then the sides because it will not connect properly. You want to attach it via from the left to right or in vise versa. If you still have the issue after trying to repair it again, then the issue is most likely a defective battery. I would recommend, if that is the issue, sending it back to seller for a refund, then purchasing a higher quality one from a seller like iFixit or Fixez, or exchanging it for a new one. Hope this helps!