The Indra 5000mAh Lithium-Ion Cell from Phottix is a spare power source for use with the Indra Battery Pack as part of the Indra500 TTL Studio Light System. This lithium-ion polymer battery offers up to 360 high-speed flashes per charge, requires 2.5 hours to reach a full charge, and has been tested for at least 400 recharge cycles. The battery packs design allows swapping batteries during shooting, making this battery a smart addition to your kit when shooting for lengthy periods. The battery also features a USB port making it capable of charging smartphones or tablets and a dual power port. With the purchase of the appropriate cable, it is able to power Phottix, Nikon, Canon, or Sony on-camera flashes.