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Two black rectangular 12 V lead-acid battery cartridges side by side

PowerWarehouse

PowerWarehouse 2XRBC2SLA244 12V Lead Acid Battery Cartridge #2 2 Pack

SKU CH-W99A-5F283

Two 12 V lead-acid cartridges replace the APC BK400B UPS battery pack

  • Compatible withFits: APC BK400B
  • Ready-to-install 12 V cartridge restores UPS runtime
  • Two-pack covers both slots in the BK400B
  • 100 % compatible with original APC equipment
  • One-year replacement warranty protects the investment

PowerWarehouse 12V Lead Acid Cartridge

This two-pack replaces the original cartridge in APC BK400B uninterruptible power supplies. It restores runtime for home-office or small-business units that protect routers, modems and entry-level workstations. The batteries arrive new and ready to install.

Sustained load behaviour

Under continuous discharge the sealed lead-acid chemistry delivers steady voltage until the UPS initiates its low-battery shutdown. Runtime scales with the connected load rather than peaking in short bursts. The pack is not suited for high-draw servers or extended-outage scenarios requiring larger capacity.

How it compares

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

Price $46.99
Pricier than about 57% of the 3,915 comparable items (median $39.99).

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Specifications

Product
Brand namePowerWarehouse
Model name2XRBC2SLA244
Compatibility
Compatible withFits: APC BK400B

Questions about this item

Does the 12V lead-acid chemistry run hot or make noise during continuous UPS operation?

Sealed lead-acid cells generate no fan noise and minimal heat under normal float charge in the APC BK400B.

Must I already own an APC BK400B UPS for this cartridge #2 pack to work?

Yes — the 2-pack is built to fit the APC BK400B as a direct replacement cartridge.

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