Pearstone BP-511A Lithium-Ion Battery (7.4V, 1500mAh) Replaces Canon BP-511, BP-511A, and BP-512 Chemistry: Lithium-Ion * Output Voltage: 7.4V Capacity: 1400mAh * Dimensions : 2.1 x 1.5 x 0.8" (53 x 38 x 20mm) 1-Year Limited Warranty