APC RBC1 Replacement Battery – 6V 4.5Ah (2 Pack)

Description

This APC RBC1 replacement battery kit includes two 6 Volt 4.5Ah AGM batteries designed to restore reliable backup power to your UPS system. Built for standby applications, these sealed lead acid batteries deliver consistent performance, long service life, and safe indoor operation.

Note: You will need to reuse the existing connectors and wiring from your original APC RBC1 battery pack.

Compatibility

Compatible with select APC Back-UPS systems that use the RBC1 battery cartridge (typically BK series and older compact units). Always verify battery configuration and dimensions before ordering.

Key Features

• Battery Pack Includes – 2 × 6V 4.5Ah AGM batteries
• Sealed AGM Technology – Maintenance-free and spill-proof design
• Rechargeable – Designed for standby and backup power use
• Non-Gassing – Safe for indoor UPS applications
• Flexible Installation – Operates in any position except inverted
• Terminal Type – F1 (.187″) spade terminals

Dimensions (Per Battery)

• Length: 2.8″ / 70 mm
• Width: 1.9″ / 47 mm
• Height: 4.2″ / 106 mm
• Weight: 1.8 lbs / 0.85 kg

Performance

• Fully charged and ready to install
• 3–5 year design life in standby applications

How do I know if this replaces my APC RBC1 battery?

Check your existing battery pack label for “RBC1” or confirm your UPS model. This replacement uses two 6V 4.5Ah batteries — if your current pack matches this configuration, it is likely compatible.

APC™ and all APC RBC part numbers are registered trademarks of American Power Conversion. Part numbers listed on this page are for reference purposes only and do not imply endorsement or sponsorship by APC.