Small desktop UPS battery backup unit with power outlets on top, next to a sealed lead-acid replacement battery

UPS battery backups

Which replacement battery fits my APC UPS?

6 sources

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Quick answer

Look up the UPS model number, not the battery number. APC's own battery selector says not to search with the number printed on your old battery or old cartridge. The UPS model number is on a sticker on the bottom or rear of the unit, not the front. Type that model into APC's selector or match it in the table below, and you get the right Replacement Battery Cartridge (RBC).

Genuine APC replacement battery cartridges: match the RBC number to your UPS model first.

APC RBC Selector APC RBC17 (12V 9Ah) APC APCRBC154 (12V 6.5Ah) APC RBC2 (12V 7Ah)

Three steps to the right UPS battery

Three steps to the right APC battery: read the UPS model sticker on the bottom or rear, check it is user-replaceable, then match the RBC number in APC's selector.

Find the model sticker. Tip the UPS over or look at the back. APC notes the letters and numbers vary by product line (for example BE600M1, BX1500M, BR1500G).
Check whether the battery is user-replaceable. APC says some Back-UPS models use batteries that are not user-replaceable, because swapping them can expose live electrical parts. Those need qualified service personnel, or a new UPS.
Match the RBC number. APC also says the internal battery's model number in your user manual matches the RBC number.

Common Back-UPS models and their RBC (APC's US and Canada list)

UPS model on the sticker	APC replacement battery	Battery rating (from APC's product page)
BE600M1, BE670M1, BN675M1	APCRBC154	12V, 6.5Ah lead-acid
BE650G1, BE850G2, BE900G3, BR700G, BX850M	RBC17	12V, 9Ah lead-acid
BK350, BK500	RBC2	12V, 7Ah VRLA
BR1000G, BX1350M	APCRBC123	24V, 7Ah lead-acid
BR1500G, BX1500M	APCRBC124	24V, 9Ah lead-acid
BE425M, BN450M, BE700G3, BVN650M1, BVN900M1	No RBC available	APC lists the battery as not user-replaceable

This is a short excerpt. APC's full table covers more Back-UPS and Back-UPS Pro models. If yours is not listed, use the selector. A few cartridge pages (APCRBC123 and APCRBC124) are titled "for Smart-UPS", but APC's Back-UPS table lists them for the BR and BX models above. Go by the table entry for your exact model.

Guides in this section

GuideAPC UPS beep codes4 beeps every 30 seconds, continuous beeping, a solid tone, or a one-minute chirp every 5 hours: what each one means.Read guide

GuideReplace Battery light won't clearCharge time, the manual self-test, and what it means when the light stays on, for Back-UPS and Smart-UPS.Read guide

GuideUPS battery lifespan3 to 5 years for lead-acid, 8 to 10 for lithium-ion, and why every 15°F of heat cuts battery life in half.Read guide

Warranty and old batteries

RBC warranty: APC says genuine RBCs carry a two-year warranty for lead-acid (VRLA) batteries and five years for lithium-ion.
Disposal: APC says to take old UPS batteries to a certified recycler or an approved drop-off. Never put them in household trash, because they contain hazardous materials.

Don't open a unit APC marks as not user-replaceable. APC warns that changing those batteries may expose live electrical components, so the job is only for qualified service personnel.

How we work: model-to-battery matches, ratings and warranty terms on this page come from APC by Schneider Electric support articles and product pages. All sources are listed below.

Questions people ask

How do I find the right replacement battery for my APC UPS?

Read the model number on the sticker on the bottom or rear of the UPS, then look it up in APC's replacement battery selector. APC says not to search with the number printed on the old battery.

What battery does an APC BE600M1 take?

APC lists the APCRBC154 (12V, 6.5Ah) for the BE600M1, BE670M1 and BN675M1.

Can every APC UPS battery be replaced?

No. APC lists some Back-UPS models, including the BE425M, BN450M and BE700G3, as not user-replaceable, because swapping the battery can expose live parts.

Sources

Last checked Oct 23, 2026. UPS batteries are heavy lead-acid or lithium cells. Follow your UPS manual when swapping them, and recycle the old battery. APC says some models are not user-replaceable.