This CTA Digital battery replaces the Panasonic CGA-DU21 digital camcorder battery. The high capacity lithium-ion battery pack will almost double the running time when compared to the CGA-DU14. It was designed to meet or exceed OEM specifications and is 100-percent compatible to the original equipment chargers. Power up with hot deals from Overstock.com. Specifications: Chemistry: lithium-ion Voltage: 7.2V mAh (capacity): 2200mAh For use with the following Panasonic camcorder models: PV-GS50/PV-GS55/PV-GS70/PV-GS120/ PV-GS200/VDR-M30/VDR-M50/VDR-M70/and all similar models