Olympus E-300 Digital Camera Battery Lithium-Ion (1850 mAh) - Replacement for Olympus BLM-01 Battery Replacement battery for the Olympus PS-BLM1, Lithium-Ion (Li-ion) 7.4V (1850mAh) 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark