Wasabi Power Battery for Pentax D-L17 and Pentax Optio 450, 550, 555, 750, 750Z, MX, MX4 Rechargeable lithium-ion battery for Pentax D-L17 Premium Japanese cells for longer battery life with no memory effect Completely compatible with the Pentax charger Rated at 3.7V and 1900mAh for a longer run time than the Pentax original Includes DL17 battery with 3-year manufacturer warranty