Keep critical loads online longer when outage duration exceeds the native UPS battery window. The CyberPower BP240VL3U01 external battery module adds dedicated runtime capacity for compatible UPS systems, making it a practical choice for infrastructure teams that need more than a standard battery cartridge can deliver. This module is designed around 20 x 12 V/7 Ah batteries and a 3U rack form factor, giving you a dense power reserve without changing the footprint strategy of the rack. It is intended for environments where graceful shutdown, ride-through, and generator handoff timing matter. For data closets, edge racks, and network rooms, that extra reserve can be the difference between a controlled event and an avoidable interruption. Because it is an external battery module rather than a basic replacement pack, it supports a more deliberate uptime strategy for higher-value UPS deployments. The 3-year warranty adds confidence for teams standardizing on long-life power protection hardware.