Minuteman BP48V36RTEXL Battery Cabinet - 48 V DC - Lead Acid - Valve-regulated/Maintenance-free/Sealed/Watertight/User Replaceable - Hot Swappable - 10 Hour Recharge Time

True hot-swappable internal batteries Front panel battery access Daisy-chain capability (no maximum limit) Dense internal battery configurations for 2-3x runtime capability Fast-recharge technology with internal charger Rackmount or tower convertible installations are standard with included hardware Unlimited runtime potential Four-post rail kits included User-replaceable internal batteries Compact 3U design for densely populated rack and cabinet installations This product is heavy and/or oversized and may need more than one person to handle.