APC PS250 UPS battery compatible replacement. Sigma’s SG-RBC18 assembly supplies one 12V 9Ah cartridge built with two 6V 9Ah Saruna SG0690T2 batteries connected in series. The photos show the connected assembly.
RBC18 cartridge specifications
| APC cartridge reference | RBC18 / APCRBC18 |
|---|---|
| Supplier assembly reference | SG-RBC18 |
| Package contents | One assembled 12V 9Ah battery cartridge |
| Internal batteries | Two Saruna SG0690T2 6V 9Ah batteries connected in series |
| Assembly voltage | 12V |
| Rated capacity | 9Ah |
| Chemistry | Rechargeable AGM sealed lead-acid (SLA) |
| Approximate assembled dimensions | 11.9 in depth × 1.3 in width × 4.1 in height |
| Approximate assembly weight | 5.70 lb (2.59 kg), per Sigma’s RBC18 product page |
| Connection | Wired connector as shown; compare connector shape and polarity with your existing cartridge |
Match your APC UPS
Check the full UPS model and revision, the RBC18 or APCRBC18 reference on the installed cartridge, connector shape, polarity, wiring arrangement and compartment clearance. Follow the UPS manufacturer’s replacement procedure. The UPS is not included.
Sigma lists this assembly for APC PS250. A shared battery voltage alone does not establish compatibility.
Internal battery documents
These documents describe each SG0690T2 battery inside the cartridge; the assembled cartridge has its own dimensions and wiring.
Related batteries and ordering help
Browse APC UPS batteries. Email Sales@RocketDistributing.com with the full UPS model, RBC number, connector photos and required quantity for matching help or volume pricing.
APC is a trademark of Schneider Electric. This is an aftermarket compatible replacement supplied by Sigma Power Systems.