High Capacity Olympus Replacement Battery for PS-BLS1 Li-Ion Battery for Olympus EP-1 Pen, Evolt E-410, E-420 and E-620 Digital SLR Cameras Olympus Digital Battery Replacement BLS-1 Lithium-Ion battery for Olympus Digital Camera/Camcorder High Quality Li-ion Battery Retains full capacity, free from memory effect Rechargeable