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replacement battery from ifixit draining quickly and charging slowly!

Hi all. I bought a replacement battery for my 2011 macbook pro from iFixit, and have found it to be very slow charging, and just now when operating on battery power it jumped from 80% charged down to 25% in a few seconds, and steadily drained down to 7% from there before I plugged it in.

Could I have missed a step in the battery replacement process?

Or could this be aside effect of buying an early 2011 battery for a late 2011 macbook, or vice versa? I bought the computer second hand so not entirely sure which one mine is.

Answer this question I have this problem too

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1 Answer

Hi Ben!

Performing a battery calibration may fix this: ++

If this does not fix the slow charge, we recommend contacting our customer support team at so we can assist with further troubleshooting. The MacBook’s model number should match the model number in the Compatibility Section of the product page for the battery.

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bencoopermusician92 will be eternally grateful.
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