Chosen Solution

This weekend I replaced the battery in my MacBook Pro with a new ifixit battery. The MacBook had worked fine until recently, when it suddenly stated that the battery was not charging and needed replacing. Following on from this, it ran exceptionally slowly and would not boot at all at times. I have replaced with a new battery, and it now turns on just fine (after an OS re-install), but is still saying that the battery is not charging. It now lists the following: Fully charged: NoCharging: NoFull Charge Capacity (mAh): 4698State of Charge (%): 1Cycle Count: 0 Could it be the new battery has an issue? Any advice would be kindly received. —- Update - CoconutBattery image as requested -

Update: Followed up with ifixit support, who believe the replacement battery was faulty, so kindly sent out a new kit. Have installed it today, and the mac is now working and charging properly :)

Could you have damaged the battery data cable or not fully secure it? I would start there

If that is in good order, I fear the charging logic needs to be investigated on the main logic board.