MacBook Pro models with 13" displays

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Why is my computer shutting down when AC adapter is unplugged?

i changed my battery with new one (Order Checkup (813617)) when battery recognised as 100% charged but fail to power my computer when the AC adapter is unplugged.

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Most likely your SMC needs to be reset. Follow this Apple TN: Intel-based Macs: Resetting the System Management Controller (SMC).

See if that fixes it

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