APC RBC40 Replacement Battery – 12V 9Ah AGM

Description

Looking for a reliable APC RBC40 replacement UPS battery? This 12V 9Ah AGM sealed lead acid (SLA) battery is a direct replacement.  It provides dependable backup power for your UPS system.

Compatible UPS Models

This RBC110 replacement battery fits a wide range of APC UPS units, including:

• APC PowerShield CP27U13AZ3
• APC PowerShield CP27U13NA2
• APC PowerShield CP27U13NA3
• APC PowerShield CP27U13SCS
• APC PowerShield CP27U13UK3
• APC PowerShield CP40U48NA3
• APC PowerShield CP40U48SCS and more

Key Features

• 12 Volt 9Ah AGM UPS Battery – 20% longer run time compared to a 7Ah battery
• Maintenance-free sealed lead acid design
• Spill-proof – installs in any position except upside down
• Pre-charged and ready for installation
• Ideal for backup power systems and emergency power protection

This APC RBC40 compatible 12V 9Ah AGM battery provides reliable emergency backup power during outages, surges and voltage drops. Designed for UPS systems to provide time for safe shutdown of computers, servers and networking equipment when utility power fails.

For full technical specifications including dimensions and terminal type, please see our main 12V 9Ah AGM SLA battery page.

FAQs

Q: Is this the correct battery for my APC PowerShield CP27U13AZ3? 

A: Yes. The RBC40 12V 9Ah AGM battery is a direct replacement for the CP27U13AZ3 UPS model and other compatible units.

Q: How do I install the APC RBC40 replacement battery?

A: Installation is simple. Slide the battery into the UPS compartment, connect the terminals, and close the cover. Installation does not require special tools.

Q: How long does an APC RBC40 battery last?

A: Most UPS batteries last 3–5 years, depending on usage and ambient temperature.

Q: Is this battery safe for home or office use?

A: Yes. It’s a VRLA battery – sealed, maintenance-free and designed for standby UPS power.

Q: What type of battery is APC RBC40?

A: It’s a 12V 9Ah AGM (Absorbent Glass Mat) sealed lead acid battery.

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.