Wasabi Power Battery for Sigma BP-41 and Sigma DP1 Merrill, DP2 Merrill, DP3 Merrill Rechargeable lithium-ion battery for Sigma BP-41 Rated at 3.6V and 1400mAh for longer battery life Premium Japanese cells for longer battery life with no memory effect Fully compatible with the Sigma camera and Sigma charger Includes battery with 3-year manufacturer warranty