The Westcott FJ80 II Lithium Polymer Battery is a compact yet powerful battery. It is lightweight and packs in 20 percent longer battery performance.20-Percent Longer Battery PerformanceWith over 500+ full-power flashes on a single charge, the removable 11.1V 1600mAh 11Wh FJ80 II Lithium Polymer Battery provides DC power for on-location freedom. Portable Speedlight PowerThis FJ80 DC battery is compact and lightweight at 0.3 lb. It charges fully in 2 hours and is rated for 300+ charge cycles. | Westcott FJ80 II Lithium Polymer Battery in Black