BRTONG 13000mAh 95Wh Battery for Apple Macbook Pro 17" A1309 A1297 (2009 Version Mid-2009 Mid-2010) Mc226/a Mc226ch/a Mc226j/a Mc226ll/a Mc226ta/a Mc226zp/a Macbook Pro 17" Precision Aluminum Unibody Battery type: Rechargable Li-Polymer Battery;Capacity:13000mAh/93.6Wh;Cells:6-cell; Voltage:7.2V 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support,12-month hassle-free warranty. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Operation time: the actual operation time will depend on how much electricity is required by the device and how you use it.