Fits for MacBook pro 15 inch a1398 battery: Battery ModelA1494 / A1618. Parameter--Capacity: 8800mAh/99.08Wh, Voltage: 11.26V. Battery Type: Li-Polymer. (Please note: We only sell A-grade batteries. The best grade of batteries produced by the same manufacturer+fully inspected shipment+latest production (weekly updated inventory).) Battery Advantages: 1.More than 1500+ recharge cycles over the life of the battery; 2.100% Safe with Upgrade chip to ensure 6-fold protection, eg.Intelligent temperature control-Over heat protection, Over charging protection, Short circuit protection...Without (swollen battery) Damage to laptop, 3. High Performance Electric Core, Real capacity can ensure the long operating time after charging full