SDNPF770 Rechargeable Lithium-Ion Battery - Ultra High Capacity (7.4V 4600 mAh) Replacement for Sony NP-F770 Battery Replacement battery for the Sony NP-F770, Lithium-Ion (Li-ion) 7.4V (4600mAh) This Synergy Digital battery is fully compatible with the original Sony NP-F770 Battery. You can rest assured that this battery will work with your Sony Camera/Camcorders that use NP-F770 and it can be charged with the original manufacturers charger. We use only high quality Japanese cells, so you are sure this battery will last for years to come. Synergy Digital is a very high reputable company that manufactures batteries and other electronic accessories for over 2 decades, all our products come with a 3 year manufacturer warranty.