Polaroid High Capacity Penatx DLI90 Rechargeable Lithium Replacement Battery (Compatible With: Pentax K-7, K-5, 645D) Memory Free Formulation Saves Charging Time & Extends Battery Life Environmentally Responsible Design Allows Hundreds Of Images To Be Shot Before The Battery Needs To Be Recharged Replaces:Pentax DLI90 7.4V/1400MAH