This has no connection to the overall charge capacity of the battery and how long it lasts however. This Grade-3 battery is holding between 75-90% of its original capacity, meaning this Grade-3 unit will have a full charge capacity between 6,500mAh and 9,750mAh.Īpple introduced an OS function that checks the status of the battery, so some of these graded batteries will have a status saying 'Service Battery' or 'Replace Soon'. The theoretical capacity of this battery when new was 13,000mAh. This is the internal battery for the MacBook Pro 17" mid 2009 and mid 2010 models.
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