Don't get caught with a dead UPS, replace your battery today with our RBC48 replacement battery for APC models SUA750, SUA750US, SUA750I. Manufactured to BTI's highest quality standards, this sealed lead acid battery meet's or exceeds the original manufacturer's specifications. At BTI quality is our obsession and we stand behind every battery product we build with our industry leading 18 month warranty. BTI... True to the original.