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Two sealed 12V lead-acid battery cartridges in plastic housing

PowerWarehouse

PowerWarehouse 2XRBC21SLA212 12V Lead Acid Battery Cartridge #21 2 Pack

SKU CH-X4D8-VAJTE

Two 12 V lead-acid cartridges replace APC BF500BB UPS batteries

  • Compatible withFits: APC BF500BB
  • 12V lead-acid cells power APC BF500BB UPS units
  • Two-pack cartridge #21 restores backup runtime quickly
  • 100% compatibility guarantee matches original equipment specs
  • One-year replacement warranty covers each battery

Direct replacement for APC BF500BB UPS units

This two-pack of 12 V lead-acid cartridges is built to match the original specification for the APC BF500BB. Each unit carries the PowerWarehouse model 2XRBC21SLA212 and is guaranteed 100 % compatible with the original equipment. The pack restores runtime for home-office or small-business backup systems.

Upgrades ageing or depleted factory cells

Replace the original batteries when runtime has dropped below useful levels or when the UPS signals a battery fault. The jump is worth it when the existing cells no longer hold a full charge after a discharge cycle. Buyers needing higher capacity or a different voltage should look elsewhere.

How it compares

Measured against everything we stock in UPS Replacement Batteries, at today’s prices. Recalculated every night.

Price $54.99
Pricier than about 63% of the 3,915 comparable items (median $39.99).

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Specifications

Product
Brand namePowerWarehouse
Model name2XRBC21SLA212
Compatibility
Compatible withFits: APC BF500BB

Questions about this item

What are the dimensions of the PowerWarehouse 2XRBC21SLA212 battery cartridge?

The cartridge is a direct replacement for APC RBC21, matching the original 12 V 7.2 Ah form factor so it slides into the BF500BB battery compartment without modification.

How do I install the two-pack in my APC BF500BB and what step is often missed?

Power down the UPS, open the front battery door, disconnect the old cartridge, insert the new 2XRBC21SLA212 unit, reconnect the red and black leads firmly, close the door, then press the self-test button to reset the battery timer.

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