The APCRBC155-UPC Replacement Battery is specifically designed for use with APC Smart-UPS® SRT1000RMXLA and SRT1000RMXLI models. This battery is a unit quantity of 1, with a gray color and UPC branding. It is compatible with various APC models such as SURT D, SURT A, and SURT models, providing reliable power protection for your devices. This replacement battery ensures that your APC Smart-UPS® system continues to function efficiently and effectively in the event of a power outage or other disruptions.