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

PowerWarehouse

PowerWarehouse 2XRBC2SLA27 UPS replacement battery 2 pack

SKU CH-70DB-ABXWV

Two-pack of 12 V lead-acid cartridges compatible with APC Back-UPS CS BK350 units

  • Compatible withFits: APC Back UPS CS BK350
  • 12 V lead-acid chemistry delivers reliable backup power
  • Two-pack design replaces both cells in cartridge #2 at once
  • 100 % compatibility guaranteed with APC Back-UPS CS BK350
  • One-year replacement warranty protects your investment

Direct APC Back-UPS CS BK350 fit

This twin-pack supplies two 12 V lead-acid cartridges built to match the original APC Back-UPS CS BK350 specifications. Each unit is guaranteed 100 % compatible with the factory equipment, so installation is a straight swap without adapter cables or firmware updates. The pair gives small-office and home users a ready spare set for immediate failover.

Sustained float charge holds voltage steady

Under continuous float the 12 V cells maintain stable output through repeated discharge cycles, avoiding the voltage sag seen in short bursts. The lead-acid chemistry tolerates deep draws better than high-rate designs, delivering predictable runtime during extended outages. Not suited for buyers who need longer runtime than the BK350 chassis allows or who require hot-swap modules in rack-mount frames.

How it compares

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

Price $45.99
Pricier than about 56% of the 3,915 comparable items (median $39.99).

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Specifications

Product
Brand namePowerWarehouse
Model name2XRBC2SLA27
Compatibility
Compatible withFits: APC Back UPS CS BK350

Questions about this item

Does the 12 V lead-acid cartridge run hot or draw extra power when the UPS is on battery all day?

The sealed 12 V lead-acid cells are designed for float operation inside the BK350; they generate only normal warmth and no additional load beyond the UPS inverter draw.

What must I already own for this 2-pack to work?

You need an APC Back-UPS CS BK350 unit that accepts cartridge #2; the two batteries install directly into that UPS without extra cables or hardware.

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