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Two rectangular 12V lead-acid battery cartridges in black plastic housings

PowerWarehouse

PowerWarehouse 2XRBC12SLA129 UPS replacement battery 2 pack

SKU CH-6CZF-R0J19

Two-pack of 12 V lead-acid cartridges that replace APC SU20000R3X155 UPS battery #129

  • Compatible withFits: APC SU20000R3 × 155
  • 12 V lead-acid chemistry delivers reliable standby power
  • Two-pack supplies both cartridges for a complete refresh
  • 100 % compatibility confirmed with APC SU20000R3X155 units
  • Replacement warranty covers the batteries for one year

PowerWarehouse 2XRBC12SLA129 two-pack

This replacement battery cartridge uses 12 V lead-acid cells built for the APC SU20000R3X155 uninterruptible power supply. The pack contains two units so both slots can be swapped at the same time. It is aimed at server-room managers who need a direct drop-in for that specific UPS model.

Slide-in cartridge installs in minutes

The cartridge slides into the UPS bay without tools; disconnect the old unit, connect the new one and close the door. Common issues are forgetting to recycle the spent batteries and leaving the UPS unpowered during the swap, which can drop the load if the bypass is not active.

How it compares

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

Price $343.99
Pricier than about 90% of the 3,915 comparable items (median $39.99).

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Specifications

Product
Brand namePowerWarehouse
Model name2XRBC12SLA129
Compatibility
Compatible withFits: APC SU20000R3 × 155

Questions about this item

How do I verify the 12 V lead-acid cartridge is working after installing it in my APC SU20000R3X155?

The UPS should complete its self-test, show a full charge indicator and report zero battery faults in its management software.

What comes in the box and what must I buy separately for the APC SU20000R3X155?

The pack contains two 12 V replacement cartridges; no extra cables or hardware are required for installation.

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