Written and reviewed by Subrahmanya S Hegde — Senior Engineer, 30 years with APC UPS systems.

When a UPS stops holding charge, you usually do not need a new UPS – just a new battery. Here is how to know, and how to do it safely.

APC replacement battery cartridge — An RBC swap restores runtime for a fraction of a new UPS.

Signs it is time

Backup time has dropped sharply – 15 minutes is now 2.
Replace-battery warning (LED or periodic beep) after a self-test.
The unit is 3-5 years old – normal lead-acid lifespan.
Swollen battery or smell – stop using it and replace immediately.

What is an RBC?

An RBC (Replacement Battery Cartridge) is APC’s genuine drop-in battery pack matched to your model. The correct RBC keeps runtime, safety and warranty intact – always match it to your UPS model number.

Step-by-step replacement

Note your UPS model number and order the matching RBC.
Power down connected equipment (safest, though many models hot-swap).
Open the battery compartment and disconnect the old pack’s connector.
Remove the old battery; insert the new RBC and reconnect firmly.
Close up, power on, and let it charge fully (often several hours) before relying on it.
Recycle the old battery responsibly – do not bin it.

Get the right pack

Match the RBC to your exact model. Browse genuine APC UPS and batteries in our collection, and tell us your model if you need help.

Browse the full range in our APC UPS collection, or talk to us for a recommendation.

Shop what this guide covers

Genuine APC RBC replacement batteriesFactory-sealed APC Replacement Battery Cartridges with full manufacturer warranty.
All APC UPS systemsThe full genuine APC range, with GST invoice and pan-India delivery.
APC UPS battery replacement guideModel-by-model chart of which APC RBC cartridge your UPS takes.

What size UPS do I need? »Find the battery for my UPS »Ask us on WhatsApp

Visit Our Store