It is a large-capacity 11.1V / 8700mAh rechargeable Lithium-ion Battery, which will give you approximately 500 full powered flashes per charge. An essential piece of kit for owners of a PiXAPRO CITI600 Portable Flash who often shoot for extended periods of time, and require the reassurance of an extra battery. The PiXAPRO CITI600 battery is designed to be used with the PiXAPRO CITI600 & CITI600 TTL and GODOX AD600B & GODOX AD600BM Portable Flash system. 100mm x 105mm x 51mm.