This APC Replacement Battery Cartridge (RBC3) is the factory-original hot-swap battery module designed for APC Back-UPS series models including the BK450, BK520, BK575, BK600, and BK650. Replacing the battery restores full UPS runtime and prolongs the life of the UPS unit itself. The cartridge contains maintenance-free, valve-regulated lead-acid (VRLA) batteries that require no watering and can be safely installed in any orientation. A replacement is recommended every 3–5 years under normal operating conditions.
Key Features
- APC Part Number: RBC3
- Compatible models: BK450, BK520, BK575, BK600, BK650
- Battery technology: VRLA (Valve-Regulated Lead-Acid) — maintenance-free
- Hot-swap replacement — no tools required, UPS stays online*
- Factory tested and shipped fully charged
- Includes all mounting hardware and cabling
- Recommended replacement interval: every 3–5 years
- UL recognized components
Specifications
| Manufacturer | APC by Schneider Electric |
|---|---|
| Part Number | RBC3 |
| Battery Type | VRLA Sealed Lead-Acid |
| Compatible UPS | BK450, BK520, BK575, BK600, BK650 |
| Chemistry | Maintenance-Free AGM |
| Replacement Cycle | 3–5 years recommended |




