APC E3SBT4 Battery String — Easy UPS 3S

The APC Easy UPS 3S Battery String (E3SBT4) provides critical extended runtime capacity for APC Easy UPS 3S systems, delivering reliable backup power protection for network infrastructure and critical equipment. This battery module consists of four 7.2 Ah VRLA battery modules designed specifically for compatibility with Easy UPS 3S units featuring internal battery slots, as well as the Easy UPS 3S Empty Modular Battery Cabinet (E3SXR6). The enclosed battery cartridge design ensures safe, efficient power storage while maintaining the professional-grade reliability that APC is known for in power protection solutions.

• Purpose-built compatibility with Easy UPS 3S range for seamless integration and extended runtime
• VRLA battery technology provides maintenance-free operation with proven reliability
• Wide operating temperature range from 0–40°C for flexible deployment environments
• Professional installation support with enclosed cartridge design for safe handling
• Enterprise-grade specifications including operation up to 95% non-condensing humidity and 3,281 ft altitude

For businesses and IT professionals running UniFi network deployments or other critical infrastructure, this battery string ensures your UPS system can maintain power protection during extended outages. The modular design allows you to scale backup runtime based on your specific requirements, making it an essential component for protecting valuable networking equipment, servers, and storage systems from power disruptions. Whether safeguarding a complete UniFi stack or other mission-critical systems, the E3SBT4 delivers the extended protection your infrastructure demands.