I recently replaced the battery in my late 2011 MacBook Pro, and the battery seems to do fine except that it will drop very quickly from about 75% down to 2% and then continue to work for quite a while (I haven't timed it but probably close to an hour if not more of normal use).
What could cause this, and how might I fix it, so that it shows a more reasonable battery life estimate?
It's a little irritating having to guess at how much time I have left before it sleeps.
- Current Charge: 114 mAh (2%)
Note: this hasn't changed from 114 in the 15 (edit: 20) or so minutes since I first checked.
- Full Charge Capacity: 5752 mAh
- Design Capacity: 6900 mAh
- Manufacture date: 2015-06-24
- Loadcycles: 13
- macOS Battery status: Good
- Discharging with: 12.15 Watts
- Manufacturer: Simplo
- Battery failure: Yes
That last one makes me a little nervous. What does "Battery failure: Yes" mean?