Power-Sonic 12V/18AH Sealed Lead Acid Battery w/ NB Terminal (also works with Elgar SPS1100) Looking for reliable performance from your Elgar SPS1100 UPS Backup? Our Elgar SPS1100 battery will provide you the performance and dependability that you demand for your UPS Backup. With an efficient rating of 12V Volt and 18 , you never have to worry about being too far from an ac outlet. Our line of Elgar SPS1100 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