Keep critical infrastructure online longer when utility power drops. The Eaton BP48RT external 48 V battery pack is designed as a 2U rack/tower extended battery module for SmartOnline UPS systems, giving you additional runtime without replacing the core UPS platform. That matters when the load is too important for a short transfer window or when shutdown timing must be controlled with precision. This module is a practical fit for environments that need more hold-up time for servers, storage, network gear, and edge systems. By adding external battery capacity, it helps bridge longer outages and gives IT teams more control over graceful shutdowns, failover sequencing, and generator start delays. The rack/tower format supports deployment flexibility in mixed infrastructure spaces where cabinet real estate and service access both matter. For teams standardizing on Eaton power protection, BP48RT extends the value of the existing UPS investment by increasing runtime at the battery layer rather than oversizing the entire system. It is a targeted upgrade for sites that need more resilience, not more complexity.