Buy in confidence from American Battery Company--the Reliable Choice. The American Battery Company RBC33 is a genuine Replacement Battery Cartridge for an Uninterruptible Power Supply (UPS). The ABC RBC33 is designed specifically for use with select APC brand UPS systems. It features two maintenance-free, sealed (leak-proof), lead-acid batteries (12V 9ah). RBC assemblies come complete with all required connectors, cable, fuses and metal enclosures where applicable, along with a simple installation guide. Genuinely assembled in the USA to OEM Standards. All ABC UPS replacement batteries are assembled right here in the USA, and made to the genuine, same exacting standards as the UPS battery you would purchase from the original equipment manufacturer. ABC was the original manufacturing division for APC replacement battery packs (RBC) until they moved their manufacturing to Asia in 2002. The only differences between an ABC battery pack and an APC battery pack are cost and what it says on the label. Each battery is tested twice for quality raw batteries are tested before assembly, and then tested again after final assembly to ensure a top-quality replacement battery pack. Along with US-based customer service and support, you can rest assured any UPS battery from ABC is built with the same quality and attention as the original UPS battery.