Guide
UPS battery cartridge codes
UPS makers often sell a drop-in cartridge with a code such as RBC17 or APCRBC124. Those codes are useful once you know your UPS model. They are not a shortcut past the model label.
Rule of thumb
Read cartridge codes as manufacturer kit IDs for a listed UPS model — not as universal battery chemistry. Start from the UPS model; use the cartridge code to confirm you ordered the listed kit. Same-looking packs from another model are not automatically interchangeable.
What the code is
APC-style codes such as RBC17 or APCRBC124 name a replacement cartridge Schneider Electric lists for specific Back-UPS models. CyberPower codes such as RB1290X2 name a CyberPower kit. Eaton and Vertiv use their own part families.
The letters are a maker's catalogue ID. They do not, by themselves, tell you voltage, cell count, or connector style on this site, because those fields are not always in the source we publish from.
Model first, then the code
Schneider's own selector asks for the UPS model, not the sticker on the old pack. Two models can share a cartridge, and one model can move to a different cartridge across revisions. Starting from an old code alone is how people buy the wrong kit.
When sources disagree
If a datasheet, manual, and product page name different cartridges, we withhold a public answer until the conflict is resolved. A near-match code on a retail listing is not enough to publish a fitment.
Related terms
The glossary explains cartridge, RBC, and related UPS wording in plain language. Use it for vocabulary; use the model page for the manufacturer-listed part.