6 Best Replacement Batteries for APC BX1500M (November 2026)

The best APC BX1500M replacement batteries include the APC Genuine UPS Replacement Battery APCRBC124 for a direct model match, the APCRBC124-UPC Replacement Battery for APC UPS BX1500M for a compatible alternative, and the APC Genuine UPS Replacement Battery APCRBC109 for BX1500LCD owners.

On this page (6 sections)

1. Which APC BX1500M replacement battery is the best fit?
2. The best replacement batteries for APC BX1500M
3. How to check the right BX1500M replacement battery
4. Should you choose a genuine APC battery or a compatible pack?
5. When a battery change may not be enough
6. Final pick for the best APC BX1500M replacement battery

The best APC BX1500M replacement battery is the genuine APCRBC124, which APC names as compatible with the BX1500M. UPC's APCRBC124-UPC is a compatible alternative, while several similarly named packs in this roundup are for different UPS models.

A replacement battery can help restore backup runtime when the UPS is otherwise in good condition. Match the full model number on your unit, since BX1500M, BX1500G and BX1500LCD are not interchangeable labels.

For a different APC 1500VA model, see Back-UPS XS 1500 replacement batteries.

For a wider look at common battery formats, see our guide to best replacement UPS batteries 12V.

Our picks at a glance

1. 1
   Best for a direct model match

   APC Genuine UPS Replacement Battery APCRBC124

   9.7/10 our score

   See it on Amazon
2. 2
   Best for a compatible alternative

   APCRBC124-UPC Replacement Battery for APC UPS BX1500M

   9.5/10 our score

   See it on Amazon
3. 3
   Best for BX1500LCD owners

   APC Genuine UPS Replacement Battery APCRBC109

   9.3/10 our score

   See it on Amazon

4. 4

   RBC33-UPC Replacement Battery for APC UPS Models

   Best for legacy BX1500 models
   Check it
5. 5

   UPSBatteryCenter Compatible Replacement Battery Pack for APC

   Best for BX1500G owners
   Check it
6. 6

   APC Replacement Battery Cartridge #124

   Best for checking RBC124 fit
   Check it

Which APC BX1500M replacement battery is the best fit?

The APC Genuine APCRBC124 is the strongest fit because APC specifically names the BX1500M as compatible. The UPC APCRBC124-UPC also names the BX1500M and offers a 2-year warranty.

The best replacement batteries for APC BX1500M

The APCRBC124 options are the only picks here that explicitly name the BX1500M. The other products can help buyers with related APC models, but their compatibility should not be assumed for this UPS.

1

APC Genuine UPS Replacement Battery APCRBC124: Best for a direct model match

9.7/10Our score

• APC names BX1500M compatibility
• 12 V sealed lead-acid battery
• 2-year manufacturer warranty

APC names the BX1500M among the compatible UPS models for this genuine APCRBC124 cartridge. It arrives assembled and has a 2-year manufacturer warranty.

See it on Amazon

Pros

• BX1500M compatibility is named
• Genuine APC cartridge
• 2-year manufacturer warranty

Cons

• APC advises checking compatibility before ordering
• A new battery may not restore runtime if the UPS itself is in poor condition

The APC Genuine APCRBC124 is the straightforward choice when you want the cartridge APC names for the BX1500M. APC also lists compatibility with the BR1500G and SMC1000-2UC, so check your UPS label if you have a different unit.

The sealed lead-acid cartridge is 12 V and comes assembled with the batteries installed. For general options, compare 12V 9Ah UPS batteries.

APC says each Replacement Battery Cartridge is tested and certified for compatibility, and backs genuine replacement batteries with a 2-year manufacturer warranty.

APC notes that a new battery can resolve most runtime issues when the UPS itself remains in good shape. If the UPS has other faults, a fresh cartridge may not deliver the runtime you expect.

Choose it when the UPS label says BX1500M and you want the APC branded replacement. Make sure the exact model is listed before buying.

2

APCRBC124-UPC Replacement Battery for APC UPS BX1500M: Best for a compatible alternative

9.5/10Our score

• Direct replacement for APC RBC124
• BX1500M compatibility is named
• 24 V sealed lead-acid design
• 2-year warranty

UPC names the BX1500M as compatible with its APCRBC124-UPC pack. The company describes it as a preassembled kit with new connectors, cables, fuses and a metal enclosure.

See it on Amazon

Pros

• BX1500M compatibility is named
• Preassembled kit
• 2-year warranty

Cons

• Made by UPC, not APC
• Confirm the exact UPS model before ordering

UPC's APCRBC124-UPC is the closest compatible alternative to APC's APCRBC124. UPC names the BX1500M and BR1500G among its compatible models, and describes the pack as a direct replacement for APC RBC124.

The 24 V sealed lead-acid kit comes preassembled with connectors, cables, fuses and a metal enclosure. UPC states that the pack has a 2-year warranty and is assembled and tested in the United States.

This is a UPC product, not an APC manufactured battery. That distinction matters if you specifically want an APC branded cartridge, while the stated BX1500M compatibility makes it a relevant option if you are open to a third-party replacement.

Pick it if you want a compatible alternative with named BX1500M fit. Confirm the full UPS model before ordering, especially if yours is a regional or modified variant.

3

APC Genuine UPS Replacement Battery APCRBC109: Best for BX1500LCD owners

9.3/10Our score

• For BX1500LCD and BR1500LCD
• Genuine APC cartridge
• 2-year manufacturer warranty

APCRBC109 is for APC BX1500LCD and BR1500LCD models, not the BX1500M. It belongs here as a reminder that nearby model names can use different cartridges.

See it on Amazon

Pros

• Compatibility names BX1500LCD
• Genuine APC cartridge
• 2-year manufacturer warranty

Cons

• BX1500M is not named as compatible

APCRBC109 is for APC BX1500LCD and BR1500LCD models, not the BX1500M. Its presence here highlights why matching the complete model name matters even when two UPS units share the “1500” label.

APC describes this as a genuine replacement cartridge tested for compatibility with the models it names. It also carries APC's 2-year manufacturer warranty, but those details don't make it the right cartridge for a BX1500M.

Buyers with the BX1500LCD should compare this option with the best APC BE600M1 replacement battery only if they also own that other model and need a separate battery. The BE600M1 is a different UPS, so its battery compatibility does not transfer to the BX1500M.

Choose APCRBC109 only for a model it names, such as BX1500LCD or BR1500LCD. For a BX1500M, use a cartridge that specifically lists that model.

4

RBC33-UPC Replacement Battery for APC UPS Models: Best for legacy BX1500 models

9.1/10Our score

• Names BX1500 compatibility
• 12 V sealed lead-acid battery
• Precharged
• 18-month warranty in product bullets

UPC names the older BX1500 among the RBC33-UPC compatible models. It does not name the BX1500M, so check with the manufacturer before considering it for that UPS.

See it on Amazon

Pros

• BX1500 compatibility is named
• Precharged battery pack
• Connectors and cables included

Cons

• BX1500M is not named as compatible
• Warranty wording differs within the product details

UPC RBC33-UPC names the BX1500, BR1500, BR1200, BT1500, BX1500BP and SC1000 among the compatible models. The BX1500M is not named, so this pick is for buyers who have one of the listed units or who can confirm fit with UPC.

The 12 V sealed lead-acid pack is described as precharged and supplied with connectors, cable and fuses. UPC's product bullets state an 18-month warranty, while other warranty text describes 2 years, so verify the warranty terms for the unit you receive.

The RBC33 name can be confusing because the model family includes several APC UPS units. It is safer to match the exact UPS label than to infer compatibility from a shared “BX1500” prefix.

Consider it for the BX1500 or another named model, not as a confirmed BX1500M replacement. If you own an RBC17 system, our guide to best APC RBC17 replacement batteries covers that separate cartridge family.

5

UPSBatteryCenter Compatible Replacement Battery Pack for APC: Best for BX1500G owners

8.8/10Our score

• For APC BX1500G
• Sealed lead-acid pack
• 1-year replacement warranty

This UPSBatteryCenter pack is for the APC BX1500G. BX1500M is not named as compatible, so don't assume the similar model names mean the pack fits.

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Pros

• BX1500G compatibility is named
• Pack is described as plug and play
• 1-year replacement warranty

Cons

• BX1500M is not named as compatible

This UPSBatteryCenter pack is for the APC Back-UPS XS 1500VA BX1500G. It does not name the BX1500M, so the similar model names aren't enough to establish fit.

The pack is sealed lead-acid and comes with a 1-year replacement warranty. UPSBatteryCenter describes installation as plug and play, but compatibility remains the first check.

Choose it only if your UPS is the BX1500G or the manufacturer confirms it fits your exact model. Owners with another APC unit should compare the full model number rather than relying on “1500VA” in the product name.

6

APC Replacement Battery Cartridge #124: Best for checking RBC124 fit

8.5/10Our score

• Cartridge #124
• 12 V sealed lead-acid battery
• Fully assembled

This APC Cartridge #124 names the BX1500M among compatible models. Check the exact UPS model and cartridge fit before ordering.

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Pros

• BX1500M compatibility is named
• Fully assembled
• APC describes it as tested for compatibility

Cons

• Warranty details are not included in the product facts here
• Verify the exact model before ordering

APC Replacement Battery Cartridge #124 names the BX1500M among compatible models, along with the BR1300G, BR1500G, BX1500G and SMC1000-2UC. Its cartridge family makes it relevant, but confirm that the exact part matches your UPS before ordering.

The cartridge is a 12 V sealed lead-acid battery and ships fully assembled. APC describes RBC cartridges as tested and certified for compatibility, and advises checking the UPS model specifications.

This is a practical option to compare against the genuine APCRBC124. The product name identifies cartridge number 124, while the APCRBC124 model number gives a more explicit match for shoppers comparing replacement packs.

Choose it if you confirm Cartridge #124 is the right part for your BX1500M. If you also own another APC unit, see our best APC RBC48 replacement batteries guide for that distinct battery family.

How to check the right BX1500M replacement battery

The safest check is to match both the UPS model and the cartridge number. APC and UPC each name the BX1500M for their APCRBC124-compatible packs, while APCRBC109 and the UPSBatteryCenter BX1500G pack name other models.

Start with the model label on the UPS itself. Then compare that full model number with the battery's compatibility details, including any suffix such as LCD or regional letters.

A shared brand, capacity class or “1500” label does not prove a fit. If the exact model isn't named, ask the battery maker to confirm compatibility before ordering.

Should you choose a genuine APC battery or a compatible pack?

Choose APC's APCRBC124 if you want the genuine APC cartridge and its stated 2-year manufacturer warranty. Choose UPC's APCRBC124-UPC if you prefer a compatible alternative that names the BX1500M and also states a 2-year warranty.

Both options identify the BX1500M specifically, which is the key distinction for this search. UPC states that its pack is manufactured by Upgrade Parts Company, while APC identifies its own cartridge as genuine.

Check what comes in the pack and the warranty terms before buying. UPC describes a preassembled enclosure with cables, connectors and fuses, while APC's cartridge arrives assembled with new batteries installed.

When a battery change may not be enough

A replacement can address runtime problems caused by an aging battery, but it cannot repair a UPS with a separate fault. APC says a new battery can fix most runtime issues if the UPS remains in good shape.

If your BX1500M still behaves erratically after a correct battery replacement, consider the condition of the UPS itself. Replacing the whole unit may make more sense when the UPS has other problems.

Final pick for the best APC BX1500M replacement battery

Pick the APC Genuine APCRBC124 if you want the APC cartridge with explicit BX1500M compatibility. Choose the UPC APCRBC124-UPC if you want a third-party pack that also names the model and carries a stated 2-year warranty.

Avoid choosing a battery based only on a similar model name. Confirm the full UPS number and cartridge fit, then compare the warranty and assembly details that matter to you.

Our top 3 picks at a glance

1. 1
   Best for a direct model match

   APC Genuine UPS Replacement Battery APCRBC124

   9.7/10 our score

   See it on Amazon
2. 2
   Best for a compatible alternative

   APCRBC124-UPC Replacement Battery for APC UPS BX1500M

   9.5/10 our score

   See it on Amazon
3. 3
   Best for BX1500LCD owners

   APC Genuine UPS Replacement Battery APCRBC109

   9.3/10 our score

   See it on Amazon

Frequently asked questions

Which battery fits the APC BX1500M?

APC APCRBC124 is the direct model match: APC names the BX1500M as compatible. UPC's APCRBC124-UPC also names BX1500M compatibility.

Check the UPS model label and the replacement cartridge details before you order.

Is APCRBC109 compatible with the BX1500M?

APCRBC109 is named for the BX1500LCD and BR1500LCD, not the BX1500M. The similar model names don't confirm a fit.

For the BX1500M, compare cartridges that specifically name that model, such as APCRBC124.

Can a new BX1500M battery restore runtime?

A new battery can fix many runtime problems if the UPS is still in good condition. APC cautions that a worn or damaged UPS may not provide expected runtime after a battery change.

If the UPS still has problems, consider whether the unit itself needs replacement.

What should I check before ordering a replacement?

Read the model number on your UPS and compare it with the battery's stated compatibility. BX1500M, BX1500G and BX1500LCD are distinct model names, and the products here do not all fit the same units.

Also check the warranty and whether the pack arrives assembled.