EXTENDED BATTERY LIFE - Powers up to 325 full-power flashes, ensuring you won't miss crucial shots during extended photography sessions with your Profoto monolights. RAPID RECHARGING - Minimizes downtime with a quick 1.5-hour recharge time using the 4.5A battery charger, keeping you ready for any photographic opportunity. VERSATILE COMPATIBILITY - Seamlessly integrates with Profoto B1 and B1X monolights, providing a reliable power source for your existing Profoto equipment. ULTIMATE PORTABILITY - Lightweight design at only 1.2 lbs and compact dimensions (3.3 x 4.1 x 2.6') make it easy to carry as a spare on any photoshoot, anywhere.