This is an original Apple battery for all models of 15" Aluminium PowerBook G4, part number A1148.
This battery has been fully charged, fully discharged and fully charged again before using Apple system profiler to determine the current capacity of the battery. This battery, when new, had a quoted capacity of 4,000mAh.
This is a grade 2-A battery. The 2 refers to the battery capacity and indicates that it currently holds 75% or more of it's original charge, in this case, more than 3,000mAh. The A refers to the cosmetic condition and indicates that the surface is almost as new, but with minor light scratches on the surface.
Image shown is a stock photo and not of the item being sold.

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