State-of-the-art NiMH batteries power the Turbo SC for lightning-fast recycling times and high capacity. Despite its mini proportions, it provides up to 225 full-power flashes with Quantum's Qflash units, or 400 shoe mount flashes, on a single 1.5-hour charge. And, like all Quantum batteries, the Turbo SC features a computerized "fuel gauge" that clearly displays the amount of power remaining and monitors charging progress.
Note! * To use this battery pack with the Canon 580EX II flash, you will have to disable Flash Custom Function #01 on the flash.