APC Smart-UPS Ultra Lithium-ion 1U External Battery Pack for extended runtime on Smart-UPS Ultra 3kW systems. Up to 10 external batteries can be connected.
- Compatible with SRTL3K & SRTL2K2 Smart-UPS Ultra Models
- Supports combining up to 10 external battery packs to meet your extended runtime needs
- Long lasting lithium-ion last 3x longer life of a traditional lead acid battery
- Standard warranty 5 years repair or replace
