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my macbook air shuts down 0-30 seconds after I unplug it from the magsafe. the computer says it's at 90%, and charging; I did an SMC reset, ran apple diagnostics (no issues detected), cleaned the port, tried using a new magsafe cable, and the system report on the battery is as follows:

Model Information:

Serial Number: D8651634CATF90JA9

Manufacturer: SMP

Device Name: bq20z451

Pack Lot Code: 0

PCB Lot Code: 0

Firmware Version: 511

Hardware Revision: 000a

Cell Revision: 1210

Charge Information:

Charge Remaining (mAh): 5735

Fully Charged: No

Charging: Yes

Full Charge Capacity (mAh): 6441

Health Information:

Cycle Count: 478

Condition: Normal

Battery Installed: Yes

Amperage (mA): 283

Voltage (mV): 8226

The I/O board was replaced a few months ago, so I don't think thats the issue.

marked as duplicate by Allan, Monomeeth Mar 21 '18 at 5:12

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  • The key to this is to look at the Amperage. Fully charged you're supposed to have roughly 6.44A. Your current Amperage is .3A - not nearly enough to power your MBA. – Allan Mar 21 '18 at 3:49
  • Sounds like an issue with your battery. I suggest bringing it to apple for more diagnostics. – l008com Mar 21 '18 at 4:54

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