APC SP12U48M UPS backup battery compatible replacement. This Sigma SG-RBC1 AGM sealed lead-acid assembly is rated 12V 4.5Ah. One replacement assembly containing two 6V 4.5Ah batteries.
For APC SP12U48M, the supplier lists cartridge reference APCRBC1. Match that reference, the complete assembly dimensions, connector and polarity to your existing battery and UPS manual before ordering. This is an aftermarket Sigma replacement, not an original APC battery.
Cartridge specifications
| Sigma part reference | SG-RBC1 |
|---|---|
| Replacement cartridge reference | APCRBC1 |
| Assembly voltage | 12V |
| Assembly capacity | 4.5Ah |
| Chemistry | Rechargeable sealed lead-acid (SLA), AGM |
| Package contents | One replacement assembly containing two 6V 4.5Ah batteries |
| Supplier-listed dimensions | 5.6 × 1.85 × 3.98 inches |
Check the cartridge, connector and UPS model
A battery voltage or shared base cell alone does not establish cartridge compatibility. Compare the complete assembly, cable routing, connector keying, polarity and mounting arrangement. Follow the UPS manufacturer’s replacement procedure; do not assume that replacement while powered is permitted.
Related cartridge and ordering help
Searching by cartridge number? See the SG-RBC1 replacement cartridge specifications for this assembly.
Browse APC UPS replacement batteries or view other UPS battery sets. For matching help or volume pricing, email Sales@RocketDistributing.com with your UPS model, cartridge reference, photos of the connector, quantity and delivery location.
APC is a trademark of Schneider Electric. This listing is for a compatible Sigma replacement, not an original APC battery.