These batteries are OEM, this means they are from the exact licensed manufacturer that Apple use to manufacture the original batteries, they have the exact same specification and work as you would expect form an original Apple battery.
We are so confident that you will be happy with this battery we offer a 12 month warranty.
Part Number: A1281 / 202-6083
Base Model Compatibility:
Voltage: 10.8v 50Wh
Warranty: This battery is covered under our 12 Month limited warranty, terms apply