Unibody MacBook Pro models with 13" displays produced from 2009-2012.

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New iFixit battery capacity dropping after 5 cycles

I purchased a "new" macbook battery to replace the old swollen battery in my 2009 MacBook Pro 13in. The battery I received was rated for 5656mAh. I replaced the battery and used Coconut battery to diagnose the new one, and it said 5519mAh was the full charge capacity after 2 cycles. I figured it takes some time to get adjusted, however, after 5 cycles it has dropped to 4855mAh maximum capacity out of the 5770mAh manufactured capacity. I am worried that I received a defective battery.

Is this the case? Or do i need to deplete the battery and cycle it a certain number of times in order to bring the capacity back up?

Any help would be much appreciated

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CAn you look in System information of OSX to see what is shown for battery cycles

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Edward Coconut battery handles that and much more.

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Did the SMC and NVRAM resets. Coconut Battery now reads 77.3 % battery capacity at 7 cycles. I believe i received a faulty battery.

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Tell us what happened to the old battery. That might help determine where the problem is,

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Do an SMC reset and NVRAM reset. 2009 models should last about 4-6hrs, you will be very lucky to get anything more than this.

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If this is a new battery installation, then calibrate the battery by discharging it to below 10%, then charging it to 100% uninterrupted.

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