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

PowerWarehouse

PowerWarehouse 2XRBC3SLA32 12V UPS Replacement Battery 2 Pack for APC BK520

SKU CH-T9P8-XBRH1

Two 12V lead-acid batteries replace cartridge #3 in APC BK520 UPS units

  • Compatible withFits: APC BK520
  • 12 V lead-acid chemistry powers APC BK520 units
  • Two-battery pack restores full runtime in one change
  • 100 % compatibility guaranteed with original cartridge #3
  • One-year replacement warranty backs every cell

Direct Fit for APC BK520

This twin-pack supplies two 12 V sealed lead-acid cartridges built to match the original specifications of the APC Back-UPS 520. Each unit slides into the existing battery compartment without adapters or wiring changes.

Ideal for Restoring Runtime on a Single UPS

The pair is sized for one APC BK520, so buyers maintaining multiple units or needing extended runtime beyond the standard cartridge should look at other configurations.

How it compares

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

Price $73.99
Pricier than about 71% of the 3,915 comparable items (median $39.99).

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Specifications

Product
Brand namePowerWarehouse
Model name2XRBC3SLA32
Compatibility
Compatible withFits: APC BK520

Questions about this item

What UPS model must I already own for this 2-pack to fit?

These 12 V batteries are direct replacements for the APC BK520 UPS cartridge #3.

Will the 12 V lead-acid cells charge correctly with the original BK520 charging circuit?

Yes, they are guaranteed 100 % compatible with the BK520's existing charger.

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