Product Description This Lithium-Ion Rechargeable Battery is compatible with 8mm Camcorders and select digital cameras. With up to 4 hours of usage time and built-in microprocessor to accurately calculate the remaining power, you'll be ready for anything! From the Manufacturer Charge up your NP-F550 InfoLithium Rechargeable Battery and get ready to shoot. Capture the scenery and smiles for up to four hours with this Sony battery and you'll find you can record even more memories with your Sony Digital Imaging products.