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Two 12V sealed lead-acid battery cartridges in a twin pack

PowerWarehouse

PowerWarehouse 2XRBC2SLA243 UPS replacement battery 12V 2 pack for APC BK400

SKU CH-PC2F-B2VE0

Two-pack of 12 V lead-acid cartridges compatible with APC BK400 UPS units

  • CompatibilityFits: APC BK400
  • 12 V lead-acid cells deliver reliable backup power for APC BK400
  • Two-battery cartridge restores full runtime in a single swap
  • 100 % compatibility guaranteed with original equipment specifications
  • One-year replacement warranty protects your investment

APC BK400 Battery Replacement

This two-pack supplies 12V lead-acid cartridges built to match the original APC BK400 specifications. Each unit is guaranteed 100% compatible with the UPS model listed, providing a direct swap for depleted internal batteries.

Restoring Runtime on Aging UPS Units

The kit replaces worn cells that no longer hold sufficient charge during outages. The upgrade is worth it when the UPS self-test fails or runtime drops below useful levels, but it does not add capacity beyond the original design.

Highlights

  • 12 V lead-acid cells deliver reliable backup power for APC BK400
  • Two-battery cartridge restores full runtime in a single swap
  • 100 % compatibility guaranteed with original equipment specifications
  • One-year replacement warranty protects your investment

Specifications

BrandPowerWarehouse
Model2XRBC2SLA243
CompatibilityFits: APC BK400

Questions about this item

What cartridge number matches the APC BK400 slot?

Cartridge #2 is the exact form factor for the APC BK400, so the 12 V pack slides straight into the existing compartment.

Which terminal orientation avoids the common reverse-polarity error?

Connect the red lead to the positive post and the black lead to the negative post before closing the cover; reversing them trips the internal fuse.

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