SDNPFE1 Lithium-Ion Battery - Rechargeable Ultra High Capacity (3.7V 550mAh) - Replacement for Sony NP-FE1 Battery for the Sony DSC-T7 Camera Replacement battery for the Sony NP-FE1, Lithium-Ion (Li-ion) 3.7V (550mAh) 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark