SDNP400 Lithium-Ion Battery - Rechargeable Ultra High Capacity (7.4V 1500 mAh) - replacement for Minolta NP-400 & Pentax D-LI50 Battery Replacement battery for the Pentax DL-I50, Lithium-Ion (Li-ion) 7.4V (1500mAh) 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark