Wasabi Power Battery for Sony NP-FV100 (3900mAh, 2-Pack) Rechargeable lithium-ion battery for Sony NP-FV100 Premium Japanese cells for longer battery life with no memory effect Compatible with the Sony camcorder and charger Rated at 8.4V and 3900mAh, identical to the Sony original Includes 2 NP-FV100 batteries with 3-year manufacturer warranty