Ensure uninterrupted power supply and restore your UPS battery runtime to original specification with the APC Replacement Battery Cartridge 159. Designed specifically for APC Smart-UPS models including SMT1500RM2UCUS, SMT1500RM2UCNC, SMT1500RM2UC, and SMT1500RMI2U, this sealed lead-acid (VRLA) battery cartridge provides reliable backup power during outages. It comes enclosed in a metallic battery tray with all required connectors for simple installation. The package includes a battery recycling guide to promote safe disposal and environmental responsibility. With an ambient operational temperature range from 0°C to 40°C and storage capabilities from -15°C to 45°C, it supports long-term durability. The cartridge is not rack-mountable and has been tested to operate effectively up to 10,000 feet in altitude with relative humidity tolerance up to 95%. Backed by a 2-year warranty, this genuine replacement battery cartridge is ideal for restoring your UPS’s backup performance efficiently.