SDDLi78 Rechargeable Lithium-Ion Battery Pack Ultra High Capacity (3.7v 800mAh) Replacement for Pentax D-Li78 Battery Replacement battery for the Pentax DL-I78, Lithium-Ion (Li-ion) 3.7V (800mAh) 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark