Quantum Instruments QB1 + (6V) Battery

With the Quantum Instruments QB1+ 1 Battery is an affordable, reliable power source with 6V power for most shoe-mounted flash units that use 4 or 5 AA batteries. Clip the QB1+ on your belt or carry it with an optional strap. Get 26 oz (737 g) of concentrated power, typically enough for 250 full power manual, and more than 1000 automatic flashes. This power source has colored LED indicators which acts as a fuel gauge so you can easily monitor battery capacity, and twin output jacks which allow two flashes to be powered together. Depending on which camera you're using, you will experience flash recycling times of 3.5 - 5 sec, 50% faster than times with AA batteries.