Power Up The Elinchrom ELB 500 TTL Battery is s 14.4V, 5Ah, 72Wh Li-Ion battery designed to be used exclusively with the ELB 500 TTL. This battery can generate 400 full-power flashes from one charge and a fast recycling time of 2 seconds at max power Stay Strong Partial charge and discharge cycles have no negative effect on the ELB 500 TTL Battery, and charging can be started or stopped at any charge level. It also features an Automatic Fault Detection System that will automatically disconnect the battery in the event temperature, voltage, or current levels exceed safe ranges. Never Lose Momentum The ELB 500 TTL's Active Charging enables you to plug into AC power and continue shooting while charging regardless of the battery's power level, keeping your workflow uninterrupted. And Travel the World At 72Wh the ELB 500 Li-Ion Battery is below most air travel restrictions so users should have no trouble traveling with it. However, please check with your specific airline and visit Elinchrom.com for necessary documentation if needed. Compatible with - Elinchrom ELB 500 TTL To Go Kit (EL10309.1), ELB 500 TTL Dual To Go Kit (EL10310.1), ELB 500 TTL Unit Without Battery (EL10232.1)