Walimex Pro Powerblock II External Battery for Canon Camera Flashes 430EZ / 540EZ / 550EX / 580EX / 580EX II / 600EX-RT black (Accessories)
for a fairly reasonable price, a good product, the things of Quantum are much more expensive. As a nice goodie you can also load his iPhone / iPad tuned. Tip: Do not forget With Canon flashes, the Custom Function 12 to turn in a flash. Which ensures
