Provides several hundred full power flashes and fast, consistent recycling for most 6 volt flash units. Specially designed modules fit into the flash battery compartment to replace unpredictable nicads or alkalines. 50% faster recycling, and consistently fast even as battery charge is depleted. 250+ full power manual shots, and 1000+ automatic shots per charge. LED Displays: Power monitor fuel gauge, on/off, and charge status/complete indicators. Easily monitor your units condition. Faster Charging: Charges fully in 3 - 10 hours with standard charger. Charge light goes out when charging is complete. Twin Output Jacks Allows two flashes to be powered together. Electronic circuit breaker prevents damage to flash or battery. Automatically shuts itself off, and cannot be turned on without a module plugged in, preventing accidental drain of the cells.