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Two sealed 12V lead-acid battery cartridges in a cardboard box

PowerWarehouse

PowerWarehouse 2XRBC2SLA221 UPS Replacement Battery 2 Pack

SKU CH-M76P-PDZR2

Two-pack of 12 V lead-acid cartridges compatible with APC Back-UPS Pro BP420PNP units

  • Compatible withFits: APC Back UPS Pro BP420PNP
  • 12 V lead-acid chemistry delivers reliable backup power
  • Two-battery cartridge restores full runtime to APC Back-UPS Pro BP420PNP
  • 100 % compatibility guaranteed with original equipment
  • Premium construction ensures consistent 221 performance over service life

Compatible 12 V Lead-Acid Pack

This two-pack supplies 12 V lead-acid cartridges built for the APC Back UPS Pro BP420PNP. Each unit is guaranteed to match the original equipment specifications. The set restores runtime to a compatible uninterruptible power supply.

Direct Swap for BP420PNP

Installation requires no tools beyond opening the UPS battery door and disconnecting the old cartridges. The pack frees the UPS from degraded cells that can no longer hold a full charge. Buyers needing a different voltage or form factor should look elsewhere.

How it compares

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

Price $40.99
Typical for this category: the median of 3,915 items is $39.99.

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Specifications

Product
Brand namePowerWarehouse
Model name2XRBC2SLA221
Compatibility
Compatible withFits: APC Back UPS Pro BP420PNP

Questions about this item

How long will the 12 V 221 cartridge last under continuous load?

The 12 V lead-acid cartridge is rated for 100 % compatibility with the APC Back UPS Pro BP420PNP and carries a one-year replacement warranty.

Does the 2-pack generate noticeable heat or noise during all-day operation?

Sealed lead-acid cells produce no fan noise and minimal heat; the pack is designed for silent, maintenance-free use inside the UPS enclosure.

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