Amsahr Replacement Battery for Apple A1322, MacBook Pro 13" models: A1278 (2009 Version), MB990-A, MB990CH-A, MB990J-A Battery type: Li-Polymer; Capacity: 58Wh; Cells:6-cell; Voltage: 11.1V;Capacity:5200mah. High quality grade "A" cells. Charges quickly. Longer discharge time. Steady output and low power consumption. More than 500 times charge-discharge cycles.All products are Certified by CE ROHS,UL1642,FCC for safety. Operation time for standard batteries(6-cell 5200mah): Around 2 hours the actual operation time will depend on how much electricity is required by the device and how you use it. 24 x 7 email support 12-month service Compatible Models: For Apple's 13 inch MacBook Pro [A1278] versions MB990LL/A MB991LL/A MC374LL/A MC375LL/A MC700LL/A MC724LL/A MD314LL/A MD313LL/A MD101LL/A MD102LL/A replacement notebook laptop battery batteries 12-months hassle-free warranty service. Please check if this battery is compatible with your computer before purchasing. Part numbers of compatible batteries and Computers are listed as following.