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Rectangular 24V 18Ah sealed lead-acid battery cartridge, grey plastic housing with plug terminals, 5.94 by 10.24 by 3.8 inches

Sigma Power Systems

Sigma Power Systems 24V 18Ah RBC12XP UPS Replacement Battery Cartridge

SKU CH-VZ0N-AGYPC

24 V 18 Ah sealed lead-acid cartridge with 28 % more capacity than OEM for APC UPS systems

  • Battery typeSealed Lead Acid
  • 28 % extra runtime from 18 Ah capacity
  • 24 V sealed lead-acid chemistry matches APC spec
  • Fully assembled cartridge enables tool-free swap
  • Voltage-matched cells extend battery and UPS life
  • Compact 5.94 x 10.24 x 3.8 in fits existing bay

Drop-in cartridge for APC UPS systems

This Sigma Power Systems RBC12XP cartridge replaces the original battery pack in compatible APC Smart-UPS and Back-UPS units. It delivers 24 V and 18 Ah using sealed lead-acid chemistry, offering 28 % more capacity than the OEM cartridge. The unit arrives fully assembled with plug-type terminals for direct connection.

Fits existing tray and reuses hardware

The cartridge measures 5.94 in long, 10.24 in wide and 3.8 in high, weighing 24.3 lbs. It contains two internal packs built from four 12 V 9 Ah cells wired in series. No new mounting brackets or cables are required; installers reuse the hardware already present in the UPS chassis.

Suits users needing longer runtime in the same

Buyers who want extended backup time without changing enclosures will benefit from the higher capacity. Those whose UPS requires a different voltage, connector style or physical dimensions should look at other cartridges that match their specific model.

How it compares

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

Price $148.99
Pricier than about 82% of the 3,915 comparable items (median $39.99).

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Specifications

Power
Battery typeSealed Lead Acid

Questions about this item

How long will the 18 Ah capacity last under continuous load?

The cartridge delivers 18 Ah at 24 V; actual runtime varies with the UPS load and battery condition.

Does the sealed lead-acid cartridge generate noticeable heat or noise during all-day operation?

Sealed lead-acid batteries operate silently; warmth is normal during extended discharge or recharge cycles.

Which APC UPS models accept this RBC12XP cartridge without modification?

It fits APC Smart-UPS and Back-UPS units that originally use the RBC12XP cartridge; verify voltage and dimensions before ordering.

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