SDNPFR1 Lithium-ion Battery - Rechargeable Ultra High Capacity (3.7V 1230 mAh) - Replacement for Sony NP-FR1 Replacement battery for the Sony NP-FR1, Lithium-Ion (Li-ion) 3.7V (1230mAh) 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark