SDNPFM500H Lithium-Ion Rechargeable Battery - Ultra High Capacity (7.4 volt 1700 mAh) Replacement for Sony NP-FM500H Replacement battery for the Sony NP-FM500H, Lithium-Ion (Li-ion) 7.4V (1700mAh) 100% compatible with your OEM battery - 3 year warranty. Made with high quality Japanese cells. Synergy Digital is a Registered Trademark