This is a lightly used Inov8 Olympus BLS1 compatible. Will fit EPL3, EP2, EP1, E400, E620 etc. Note: unlike some, this one fits and charges properly in the original Olympus charger. Li-ion 7.4V 1000mAh Bought to tide me over while the Oly one turned up. £20 delivered in the UK. Will post elsewhere with tracked postage at cost.