Hitech - Olympus BLM-01 / BLM-1 Replacement Battery for Olympus EVOLT E510 / E500 / E300 SLR Digital Camera Replaces Olympus PS-BLM1/ BLM-1 / BLM-01 For Olympus EVOLT E510 / E500 / E300 SLR Digital Camera Li-ion rechargeable battery . Capacity: 1400mAh; Voltage: 3.7V 100% compatible and meet or exceed original specifications. Item described available at Hitech merchant