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Rectangular sealed lead-acid battery pack, black plastic casing, terminal connectors visible, 5.94 by 2.52 by 3.70 inches, 5.5 lbs

PowerWarehouse

PowerWarehouse RBC40-PW laptop battery 12V 18Ah 5.5 lbs

SKU CH-8EX0-5T5PJ

12V 18Ah sealed lead-acid replacement cartridge for APC UPS models, 5.5 lbs

  • Measurements5.94 in L × 2.52 in W × 3.7 in H
  • Compatible withCP15U48D, CP16U48NA2, CP24U12AZ3, CP24U12AZ3-F, CP24U12NA3,
  • Product weight5.5 lb (2.49 kg)
  • Replaces RBC40 and Battery Cartridge #40 directly
  • Fits CP15U48D CP16U48NA2 CP24U12AZ3 CP24U12NA3 and CP27U13NA3 series
  • Maintenance-free sealed lead-acid design prevents leaks
  • 12 V 18 Ah capacity powers compatible APC units
  • Compact 5.94" x 2.52" x 3.70" size at 5.5 lbs

Replacement Battery Cartridge #40

This sealed lead-acid unit replaces APC Battery Cartridge #40 (RBC40) and fits a long list of CP-series UPS models from CP15U48D through CP40U48SC3. It arrives new, maintenance-free and leak-proof, weighing 5.5 lbs with dimensions of 5.94" L x 2.52" W x 3.70" H.

IT managers restoring runtime on compatible APC

The battery suits administrators who need a direct drop-in for the listed cartridges without rewiring or firmware changes. Buyers whose UPS uses a different cartridge number or a lithium-based pack should look elsewhere.

12 V 18 Ah sealed lead-acid chemistry

The 12-volt, 18-ampere-hour rating is the single figure that determines whether this cartridge matches the original specification; verify that your UPS documentation calls for exactly those values before ordering.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $26.99
Cheaper than about 58% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand namePowerwarehouse
Model nameRBC40-PW
Part numberRBC40-PW
Size & build
Measurements5.94 in L × 2.52 in W × 3.7 in H
Product weight5.5 lb (2.49 kg)
Compatibility
Compatible withCP15U48D, CP16U48NA2, CP24U12AZ3, CP24U12AZ3-F, CP24U12NA3, CP24U12NA3-F, CP24U12NA3-F1, CP24U12NA3-F2, CP24U12NA3-F3, CP24U12NA3-F4, CP24U12NA3-F5, CP24U12SC3, CP24U12SC3-F, CP24U12UK3, CP27U13AZ3, CP27U13AZ3-6, CP27U13AZ3-F, CP27U13AZ3-F-NB, CP27U13NA2, CP27U13NA3, CP27U13NA3-4, CP27U13NA3-6, CP27U13NA3-6A, CP27U13NA3-G, CP27U13NA3-S, CP27U13SC3, CP27U13SC3-6, CP27U13SC3-F, CP27U13SC3-G, CP27U13UK3-G, CP40U48NA3, CP40U48SC3

Questions about this item

How much heat or noise does the 12 V 18 Ah sealed lead-acid pack produce when the UPS runs all day?

The maintenance-free sealed lead-acid design has no moving parts, so it generates no fan noise and only minimal warmth during normal float charging and discharge cycles.

Which APC Smart-UPS models must I already own for the RBC40-PW cartridge to fit and work?

It directly replaces Battery Cartridge #40 in units such as CP15U48D, CP16U48NA2, CP24U12AZ3, CP24U12NA3, CP27U13AZ3, CP27U13NA3 and CP40U48NA3.

Will the 5.94" x 2.52" x 3.70" cartridge slide into the same bay as my existing RBC40 without cable changes?

Yes, the dimensions and terminal layout match the original RBC40 cartridge, so it fits the same compartment and connects to the existing wiring harness.

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