APC RBC55 Replacement Battery – 12V 18Ah (4 pack)

Description

The APC RBC55 Replacement battery kit includes (4) 12V 18Ah AGM batteries for reliable backup power in compatible APC UPS systems.  These sealed, maintenance-free batteries are designed for safe, indoor operation.  Each battery is fully charged and ready to install.

This kit includes four batteries required to replace one APC RBC55 cartridge. You will need to reuse your existing wiring, cables and battery tray.

Compatibility

Compatible with select APC Smart-UPS systems including:

• APC SUA2200
• APC SUA3000
• APC SMT2200
• APC SMT3000

Always verify battery configuration and dimensions before ordering.

Key Features

• Battery Pack includes 4 x 12V 18Ah AGM Batteries
• Maintenance-free sealed lead acid design
• Spill-proof design installs in any position except upside down
• Pre-charged and ready for installation
• Ideal for backup power systems and emergency power protection

For full technical specifications including dimensions and terminal type, please see our main 12V 18Ah AGM SLA battery page.

Frequently Asked Questions

What batteries are included in an APC RBC55?

The RBC55 uses four 12V 18Ah AGM batteries connected together to provide reliable backup power for your UPS system.

Do I need to reuse my existing battery tray or wiring?

Yes you will reuse your existing cables, connectors, and battery tray when installing these replacement batteries.

Do you offer installation for RBC55 batteries?

Yes. RBC55 batteries require installation into your existing tray using your existing wiring and cables. We offer in-store installation services — contact us for pricing and availability.

How long do RBC55 batteries last?

Most UPS batteries last 3–5 years depending on usage, temperature, and charging conditions.

What systems commonly use RBC55 batteries?

RBC55 batteries are commonly used in APC Smart-UPS 2200 and 3000 systems, often found in server rooms, network infrastructure, and critical backup power applications.

Not sure if this is the right battery? View our UPS Battery Compatibility Guide to find the correct replacement.

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.