Bolt Cyclone PocketMax PP-1000 Compact Power Pack

Designed to give you plenty of power in a compact form factor, the Cyclone PocketMax PP-1000 from Bolt is a 5200mAh lithium-ion battery pack that weighs only 11.1 oz and can easily fit in your shirt or jeans pocket. It is compatible with a wide variety of flashes with high-voltage terminals, including Canon, Nikon, and Sony models. Providing up to 1000 full-power pops, the pack boasts recycling times as fast as 1.5 seconds even with most power-hungry units at full power, with this time considerably shrinking at lower power settings.