Lenovo 55943BX 3KVA 2U Extended Battery Module | Rack/Tower UPS

When uptime depends on more than the base battery string, this Lenovo external battery module gives the UPS additional reserve capacity. It is designed for the Lenovo RT3KVA UPS, making it a focused expansion option for teams that need longer ride-through without changing the core power architecture. The 2U rack-or-tower design fits the way real infrastructure is deployed: in racks, in towers, and often in spaces where flexibility matters as much as capacity. That makes it easier to standardize power protection across sites while still giving higher-value systems the runtime they need. For IT teams protecting servers, storage, and network equipment, this module helps bridge the gap between a brief interruption and a controlled shutdown. It can also provide the extra margin needed while waiting for generator transfer or utility restoration. In environments where downtime has a cost, a dedicated battery expansion module is a practical way to buy time without overbuilding the UPS itself.