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Rectangular sealed lead-acid battery, black plastic case, 5.94 by 2.52 by 3.70 inches, 5.5 lbs

PowerWarehouse

PowerWarehouse RBC2-PW UPS replacement battery 5.5 lbs

SKU CH-SYM8-27JSH

Replaces APC Battery Cartridge #2 in BE and BK series UPS units with a sealed, maintenance-free 5.5 lb lead-acid cell

  • Measurements5.94 in L × 2.52 in W × 3.7 in H
  • Compatible withBE400-LM, BE500-IN, BE500R, BE500R-AS, BE500R-CN, BE500U, BE
  • Product weight5.5 lb (2.49 kg)
  • Maintenance-free sealed lead-acid design prevents leaks
  • Direct replacement for APC RBC2 Battery Cartridge #2
  • Compatible with BE400-LM, BE500-IN, BE550-UK and many more
  • Compact 5.94" L x 2.52" W x 3.70" H fits existing bays
  • 5 lb weight matches original cartridge specifications

Direct replacement for APC cartridge #2

The PowerWarehouse RBC2-PW is a sealed lead-acid battery built to fit the original Battery Cartridge #2 slot. It matches the form factor of the APC units listed in the compatibility roster, so installers can swap the old pack without rewiring or bracket changes. The 5.5 lb unit arrives ready to mount in the UPS chassis.

Maintenance-free sealed construction

The leak-proof design eliminates electrolyte checks and reduces the risk of corrosion inside the UPS cabinet. Because the cells are valve-regulated, the pack can operate in any orientation the original cartridge supported. An 18-month warranty from the US-based supplier covers defects in materials and workmanship.

Lead-acid chemistry limits runtime and cycle life

Sealed lead-acid cells deliver reliable standby power but lose capacity faster than lithium alternatives under frequent deep discharges. Float voltage drift and temperature sensitivity mean runtime will shorten after several hundred cycles or in warm rooms. Users needing longer autonomy or daily cycling should plan for a chemistry upgrade rather than repeat replacements.

How it compares

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

Price $29.99
Typical for this category: the median of 27,790 items is $30.99.

Specifications

Product
Brand namePowerwarehouse
Model nameRBC2-PW
Part numberRBC2-PW
Size & build
Measurements5.94 in L × 2.52 in W × 3.7 in H
Product weight5.5 lb (2.49 kg)
Compatibility
Compatible withBE400-LM, BE500-IN, BE500R, BE500R-AS, BE500R-CN, BE500U, BE500U-CN, BE500Y-IN, BE525-AS, BE525-RS, BE550-AZ, BE550-CP, BE550-FR, BE550-GR, BE550-IT, BE550-KR, BE550-LM, BE550-RS, BE550-SP, BE550-UK, BE600-BR, BE600-LM, BE600D-BR, BE700-LM, BH500INET, BH500NET, BK200, BK200B, BK250B, BK280B, BK300C, BK300I, BK300MI, BK300MICM, BK300MICW, BK300 × 116, BK325-RS, BK325I, BK350, BK350-FR, BK350-GR, BK350-IT, BK350-RS, BK350-UK, BK350EI, BK350EIX545, BK350J, BK400, BK400B, BK475-RS, BK475I, BK500, BK500-CH, BK500-FR, BK500-GR, BK500-IT, BK500-RS, BK500-UK, BK500BLK, BK500CI, BK500EI, BK500I

Questions about this item

How often does the sealed lead-acid cell inside the RBC2-PW need to be replaced?

The maintenance-free sealed lead-acid battery typically lasts three to five years before a new cartridge is required.

What limits the runtime of the RBC2-PW during an extended outage?

Capacity is fixed by the sealed lead-acid chemistry; once the stored charge is depleted the UPS shuts down.

Does the RBC2-PW generate noticeable heat or fan noise when the UPS runs all day?

The sealed lead-acid cartridge itself produces no fan noise and only minimal warmth during normal float charging.

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