Hi there, I just got back my MBP (15" late 2008 2.8Ghz) from the apple store repair service, they did replace other stuff, but I suspect that they also replaced my original battery, without listing it on the list of parts repaired. The repair requested was not battery or power related. I don't have a record of what the serial number of the original battery is. Is there a way to check what the original battery serial is? Is there a record inside my Mac somewhere that I could check? I do have a new battery I bought recently. The serial numbers that I have are: 1- battery returned from repair: 6N844049N13EB Design Capacity: 4600 mAh Current Capacity: 4344 mAh Cycles: 226 Health: 94% 2- battery recently bought: 6N8430CA213E Design Capacity: 4600 mAh Current Capacity: 4600 mAh Cycles: 24 Health: 100% How can I decipher these serials? My concerns are that the battery they gave me back has some dents and scratches, that my original one didn't have, and the design capacity mAh vs the current one. Also what was long was the battery supposed to last as per the specs by apple for this MBP model?