cross-reference between discontinued and current RBC numbers, but it isn’t always obvious from the box. A few practical examples we see often in Indian households and offices:Discontinued RBCTypical Original UPSCommon Compatible ReplacementRBC2 (older case design)Back-UPS 500/650 seriesRBC17 or RBC110 depending on terminalRBC110 (early revision)Back-UPS BX/BV 600-800VARBC110J (current revision)RBC124 (discontinued pack)Smart-UPS SMC/SMT 1000-1500VARBC124 current stock or RBC133 for higher-capacity SMT modelsWhen in doubt, it’s faster and safer to send us a photo of the old battery’s label — voltage, Ah and dimensions are usually printed clearly — and we’ll confirm the current equivalent before you order.Step 3: Verify Physical Fit Before You BuyA battery that’s electrically correct but 5-10mm larger than the original can jam against the UPS casing or battery tray, especially in compact Back-UPS units like the 600VA or 850VA models. Always check:Overall length × width × height against the old battery or the UPS’s internal battery compartment dimensions (usually in the user manual).Whether the terminal orientation (top vs side) matches, especially for tower-style units mounted in a cabinet.Weight difference — a heavier cell generally means higher Ah, which is fine, but confirm it still slides into the same slot.Pro-series (BR) and Smart-UPS models usually have tool-less battery trays, making a physical-fit check quick before you order online.Step 4: When No Direct Match Exists — Consider UpgradingOccasionally a very old UPS (10+ years) has no direct or near-equivalent RBC available anymore. In that situation you have two realistic options:Fit a higher-Ah battery of the same voltage and terminal type if it physically fits — this only increases runtime, never causes harm.Replace the UPS itself if the unit is genuinely end-of-life, since a brand-new Back-UPS or Back-UPS Pro from our APC UPS range will also come with a fresh, easily-sourced current-generation RBC number.Replacing Batteries Across an Office FleetIf you’re a facility manager managing a dozen or more APC UPS units of varying ages, chances are several different RBC numbers — some current, some discontinued — are involved. Rather than ordering one by one, list out each UPS model and old RBC number and use our instant quotation builder to generate a single consolidated, GST-inclusive PDF quote covering all the current-generation replacements in one order.FAQsWill a compatible RBC battery void my UPS warranty?No. As long as the replacement matches voltage, Ah rating (equal or higher) and terminal type, using a correctly cross-referenced current-generation RBC does not affect your UPS’s warranty.Can I mix an old battery with a new compatible one in a dual-battery UPS?It’s not recommended. Mismatched batteries charge and discharge at different rates, which shortens the life of both and can trigger false low-battery alarms. Replace both cells together.How do I know if my old RBC number is actually discontinued and not just out of stock?Check with your seller directly — a genuine discontinuation means the part number is permanently retired by APC, whereas a stock-out is temporary. We can confirm this instantly when you share your old battery’s label details.Is it cheaper to find the exact old RBC number second-hand than buy the current replacement?Not advisable. Old-stock or second-hand batteries are likely to already be degraded from shelf age, and you’ll lose any manufacturer warranty. A current-generation compatible RBC is almost always the better long-term value.
