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The Strobies Pro-Flash Battery Pack from Interfit provides power for a Pro-Flash One Eighty or select shoe-mount flash units. It also has two power ports for attaching multiple units. It uses a rechargeable lithium-ion battery with a capacity of 4,500mAh. This is capable of being completely charged in about 3 hours.
During use, it can provide up to 700 full-power flashes with the Pro-Flash One Eighty or up to 1800 with a standard speedlight. Using this pack with flash units requires the use of an optional power cable specific to the flash model and battery pack.