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Rectangular sealed lead-acid battery pack with terminal posts, black plastic casing

PowerWarehouse

PowerWarehouse RBC51-PW laptop battery

SKU CH-C3KV-6V8HG

Replacement sealed lead-acid battery cartridge for APC UPS models including 300, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900 and 1000 series.

  • Measurements5.95 in L × 3.72 in W × 2.56 in H
  • Compatible withAVR550U, AVR650UM, AVR700U, AVR700UXRM, AVR750U, AVR750UTAA,
  • Product weight5.7 lb (2.59 kg)
  • Direct replacement for Battery Cartridge #51
  • Fits APC UPS models from 300 VA to 1000 VA
  • Sealed lead-acid design prevents leaks
  • Compact 5.95 x 3.72 x 2.56 in form factor
  • Weighs 5.70 lbs for easy handling

PowerWarehouse RBC51-PW replacement battery

The PowerWarehouse RBC51-PW is a new sealed lead-acid replacement cartridge designed for APC uninterruptible power supply units. It fits models such as the AVR550U, AVR700U, AVR750U, AVR900U, SMART550USB and OMNI700LCD. The maintenance-free design prevents leaks during operation. This cartridge restores backup runtime for compatible UPS systems.

Verify your UPS model before ordering

Check the label on your existing unit to confirm it appears in the supported list such as AVR550U, AVR700UXRM, AVRT450U, BC600SINE, ECO900LCDU2 or SMART750USBTAA. Ensure the cartridge bay accepts the 5.95 inch length, 3.72 inch width and 2.56 inch height dimensions. The unit weighs 5.70 lbs so confirm the chassis can support that mass. Cross-reference the OEM part number RBC51 or Battery Cartridge #51 for exact match.

Maintenance-free sealed lead-acid cartridge

The sealed construction eliminates electrolyte maintenance and reduces leak risk in rack or tower installations. An eighteen month warranty covers the replacement period. No extra cables, mounting brackets or management software are bundled with the cartridge. Installation uses the existing connectors already present in the compatible UPS models.

How it compares

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

Price $25.99
Cheaper than about 60% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand namePowerwarehouse
Model nameRBC51-PW
Part numberRBC51-PW
Size & build
Measurements5.95 in L × 3.72 in W × 2.56 in H
Product weight5.7 lb (2.59 kg)
Compatibility
Compatible withAVR550U, AVR650UM, AVR700U, AVR700UXRM, AVR750U, AVR750UTAA, AVR900U, AVRT450U, AVRT650U, AVRX750U, AVRX750UD, BC600SINE, BC600TU, BC800U, BCPERS450, BCPRO600, ECO1000LCD, ECO750UPS, ECO900LCDU2, ECO900UPSM, HT850UPS, INTERNET500I, INTERNET750U, INTERNET900U, INTERNETOFFICE500, INTERNETOFFICE700, IO700NAFTA, OMNI300NAFTA, OMNI500ISO, OMNI650LCD, OMNI700LCD, OMNI700LCDT, OMNI900LCD, OMNISMART300PNP, OMNISMART500, OMNISMART500TU, OMNISMART700, OMNISMART700M, OMNIVS1000, OMNIVS1000TAA, OMNIVS800, OMNIVSINT1000, OMNIVSINT800, OMNIVSX1000, OMNIVSX1000D, OMNIVSX850, OMNIVSX850D, POS500, PO

Questions about this item

Does the RBC51-PW box include mounting hardware or cables, or must I buy them separately?

The package contains only the sealed lead-acid battery cartridge; no brackets, screws or cables are supplied. Re-use the original hardware from your UPS when swapping the old unit.

My UPS is an APC SMART750USB — is the RBC51-PW the correct replacement, or do I need a different capacity?

The RBC51-PW is listed as compatible with the SMART750USB and all other models shown in the compatibility list; no alternate capacity version is offered for these units.

What does the 18-month warranty cover once the battery is installed in my UPS?

The 18-month warranty covers defects in materials and workmanship of the replacement cartridge itself; it does not extend to the UPS electronics or runtime performance.

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