The SRTDBP3KR2-LA external battery pack extends the runtime capabilities of 2. 2/3kVA next generation Smart-UPS On-Line systems while maintaining the revolutionary multi-chemistry flexibility that defines the platform. This expansion unit seamlessly integrates with compatible UPS models, supporting current VRLA technology and future lithium-ion deployments without requiring system replacement. Up to 10 battery packs can be daisy-chained together, providing scalable runtime extension from minutes to hours based on load requirements. The hot-swappable design enables zero-downtime battery maintenance and replacement. The multi-chemistry platform protects long-term investment by supporting emerging battery technologies as they become available.