Power-Sonic PS-640 6V/4.5AH Sealed Lead Acid Battery w/ F1 Terminal (also works with Leadman LU-650A) Looking for reliable performance from your Leadman LU-650A UPS Backup? Our Leadman LU-650A battery will provide you the performance and dependability that you demand for your UPS Backup. With an efficient rating of 6V Volt and 4.5 , you never have to worry about being too far from an ac outlet. Our line of Leadman LU-650A batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility and safety to exceed original equipment manufacturer specifications. With an industry leading warranty and customer service, you can’t go wrong. ... More Info