New battery displaying incorrect percentage & dying around 30%.

Hey all,

Just replaced my Macbook battery and the charge is lasting a fantastic amount of time! Only problem I’ve run into is an inaccurate display of charge. For instance, Coconut Battery displays it at anywhere from 95-99%, while the icon on the top bar displays 100%.

I was in the process of calibrating it after an SMC reset, but noticed that it went to sleep at around 29%. I know we’re supposed to wait at least five hours so it fully drains before charging again, so I was concerned that it wouldn’t be enough time if it was still so high.

Any advice on this? Here are specs on the battery:

System Info:

Battery Information:

Model Information:

• Serial Number: D8622873BQZDNMGAX
• Manufacturer: SMP
• Device Name: bq20z451
• Pack Lot Code: 0
• PCB Lot Code: 0
• Firmware Version: 511
• Hardware Revision: 3
• Cell Revision: 1150

Charge Information:

• Charge Remaining (mAh): 8071
• Fully Charged: No
• Charging: No
• Full Charge Capacity (mAh): 8604
• Health Information:
• Cycle Count: 2
• Condition: Normal
• Battery Installed: Yes
• Amperage (mA): -1670
• Voltage (mV): 12058

P.S.: Other small issue, Dark Mode keeps switching off and back to Light Mode after shutting down and restarting. Mildly irritating.