This Bolt Cyclone PP-310 Compact Power Pack Kit
from B&H Photo
bundles the Cyclone PP-310 with the BO-CZ Canon flash cable. Benefit from a reliable, lightweight (14.1 oz) power source compatible with most high-voltage hot shoe and handle mount flash units. Additionally, take advantage of an adjustable 30"-6' cable enabling the Cyclone to power compatible Canon and Nissin flash units.
Building on the success of the PP-300, the Cyclone PP-310 upgrades the original Ni-MH battery to li-ion and gives you 100 more full-power flashes, for a total of up to 500 on a 2-hour charge. Remaining power can be monitored via four LED indicators. Typical recycling time is approximately 1 sec. The power pack includes a 100-240VAC charger for worldwide use, a car charger for traveling, a removable belt clip, and a neoprene shoulder strap with quick release buckles.