Kastar Replacement Battery 2-Pack for Canon BP-511 / BP-508 / BP-512 / BP-522 and Canon PowerShot G2 / G3 / G5 / G6 / ZR-10 / ZR-20 / ZR-40 / ZR-50 / ZR-60 / ZR-70 Cameras Replace Battery: Canon BP511 / BP508 / BP512 / BP514. Specifications: Voltage 7.4V (volts); Capacity 2600mAh. Chemistry: Lithium Ion Rechargeable - No Memory Effect; Utilizes BSP Technology for Surge and Overload Protection, Thermal-Cut-Off; Guards Against Short Circuits. Package Includes: 2 Batteries.