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Rectangular sealed lead-acid battery in black plastic housing with terminal posts visible

PowerWarehouse

PowerWarehouse LEADACIDSLA12-18 UPS Replacement Battery

SKU CH-2H0B-W8W90

12V 18Ah sealed lead-acid cartridge replaces APC RBC12 in SU3000R3X145 UPS units

  • Maintenance-free operation with sealed lead-acid design
  • 12 V 18 Ah capacity powers APC SU3000R3X145 UPS units
  • Direct replacement for APC RBC12 cartridge #12
  • Brand-new PowerWarehouse battery ready for immediate installation

Compatible UPS Battery Replacement

This 12 V sealed lead-acid battery replaces the RBC12 cartridge used in the APC SU3000R3X145 uninterruptible power supply. It arrives ready to install with no electrolyte handling required. The maintenance-free design suits server rooms and network closets that need dependable backup power.

When a Fresh Cartridge Makes Sense

Replace the unit when runtime drops below acceptable levels or the UPS signals a battery fault. A new cartridge restores full autonomy for the 3000 VA load without upgrading the entire appliance. It is not suited for systems that require a different voltage or form factor.

Highlights

  • Maintenance-free operation with sealed lead-acid design
  • 12 V 18 Ah capacity powers APC SU3000R3X145 UPS units
  • Direct replacement for APC RBC12 cartridge #12
  • Brand-new PowerWarehouse battery ready for immediate installation

Specifications

BrandPowerWarehouse
ModelLEADACIDSLA12-18

Questions about this item

Will the 12 V 18 Ah SLA pack fit inside the APC SU3000R3X145 chassis?

The replacement cartridge is built to the same footprint as the original RBC12 module, so it slides into the SU3000R3X145 battery bay without modification.

What is the correct sequence for swapping the RBC12 cartridge, and which step is most often missed?

Power down the UPS, open the front bezel, unplug the old cartridge connector, insert the new pack, reconnect the same plug, close the bezel, then run the self-test — skipping the self-test is the step most users forget.

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