The External Flash Battery Pack is an external power source for a higher flash capacity. Reduces recycle by more than half. This high performance power pack is a light, compact external power source for use with all Canon flashes. This is a must have for event photography, such as weddings.
Reviewed by 1 customers
The Phottix pack is a solidly built battery holder. It holds the batteries more firmly than the, oem, Canon pack. It does, however, lack the velcro strap, on the included pouch, that the Canon one has. I would have used that strap to attach it to my light stand. If that is not a deal breaker for you, go for it, especially at this price.