Battery cartridge kit provides longer runtimeThe Tripp Lite RBC54 UPS replacement battery cartridge kit restores your UPS to its original runtime specifications and each replacement battery set comes pre-assembled and ready for installation. This 12 VDC replacement battery cartridge kit is rugged and leak proof. Dimensions: 3.7 H x 2.5 W x 5.9 D. Recharge time: 4 hour Battery life: 3 - 5 years. Output voltage: 12 VDC. Battery chemistry: Maintenance-free spill proof lead acid. Compatible with variety of UPS brands like Tripp Lite Best Powerware Liebert and other UPS. Form factor: Internal. Restores UPS runtime performance to its original runtime specifications. Reusable packaging contains expired batteries for recycling center delivery. Features rugged leakproof construction and wide operating temperature range. Includes 4 x 12 V UPS replacement batteries instruction manual with installation recycling and warranty information. Comes with 18 month limited warranty. Comes with 18 months limited warranty. 18-month manufacturer limited warranty. Sold as 1 Each.