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Rectangular black sealed lead-acid battery with terminals on top

PowerWarehouse

PowerWarehouse RBC45-PW laptop battery BE350

SKU CH-FW6Q-S49N9

Replacement sealed lead-acid battery cartridge for APC BE350 UPS units

  • Measurements2.94 in L × 3.9 in W × 4.4 in H
  • Compatible withBE350
  • Product weight3.75 lb (1.7 kg)
  • Ready for BE350 UPS units with direct cartridge replacement
  • Leak-proof sealed lead-acid design keeps equipment safe
  • Maintenance-free operation eliminates fluid checks
  • Compact 2.94" x 3.90" x 4.40" footprint fits existing bay
  • 75 lb weight matches original handling expectations

Purpose-built replacement

The PowerWarehouse RBC45-PW is a new sealed lead-acid battery built to fit the BE350 unit. It serves owners who need a direct swap for the original cartridge without modifying the chassis. The maintenance-free design eliminates the risk of leaks during handling or operation.

Maintenance-free advantage

The sealed construction means no electrolyte checks or top-ups are required after installation. Users simply remove the spent cartridge, insert this unit and restore backup power. The leak-proof casing protects surrounding equipment from acid damage during transport or long-term deployment.

Form-factor constraint

Physical dimensions of 2.94 L x 3.90 W x 4.40 H inches and a weight of 3.75 LBS fix the battery to compartments that match the BE350 footprint. Builders whose enclosures differ by even a few millimetres cannot use this cartridge. The 18 month warranty covers the unit only when installed in the listed compatible model.

How it compares

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

Price $24.99
Cheaper than about 62% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand namePowerwarehouse
Model nameRBC45-PW
Part numberRBC45-PW
Size & build
Measurements2.94 in L × 3.9 in W × 4.4 in H
Product weight3.75 lb (1.7 kg)
Compatibility
Compatible withBE350

Questions about this item

Will the sealed lead-acid cells in the RBC45-PW ever need topping up with water?

No, the battery is maintenance-free and sealed so it never requires water or electrolyte checks.

What limits runtime when the BE350 runs on this battery during a long outage?

The 18-month design life is the first limit; after that period capacity drops and the pack should be replaced.

Does the RBC45-PW get hot or make noise while the UPS runs all day on battery?

Sealed lead-acid chemistry produces no fan noise and only slight warmth during normal discharge.

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