HomeAPC SMX48RMBP2U UPS External Battery Pack 48V DC - Spill Proof, Maintenance Free Sealed Lead Acid Hot-swappableAPC UPS Extended Battery PackSKU: SMX48RMBP2U$650.99PriceQuantityAdd to CartRETURN AND EXCHANGE POLICYNo returns or exchanges All Defects-Call APC 800-890-4272