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Rectangular sealed lead-acid battery, grey plastic case, two terminals on top

PowerWarehouse

PowerWarehouse LEADACIDSLA43-21 12V 5Ah UPS replacement battery

SKU CH-DJQQ-KH78N

12 V 5 Ah sealed lead-acid battery replaces APC RBC43 cartridge #43 in SUM3000RMXL2U units

  • 12V 5Ah capacity keeps APC SUM3000RMXL2U running during outages
  • Maintenance-free lead-acid design removes fluid checks from routine upkeep
  • Direct RBC43 cartridge #43 fit cuts install time for technicians
  • New PowerWarehouse LEADACIDSLA43-21 unit arrives ready for immediate deployment

12V 5Ah UPS replacement cartridge

This 12V 5Ah sealed lead-acid cartridge replaces the RBC43 module in compatible APC UPS units. It is built for maintenance-free operation in rack-mount power protection systems. The unit suits administrators who need a direct drop-in battery for scheduled refresh cycles.

Thermals noise and power draw

Sealed lead-acid chemistry produces no audible fan noise during normal float charging. Heat output remains low while the UPS maintains standby charge. The battery accepts charge current within the UPS controller limits without extra cooling. It is not suited for applications that require lithium energy density or rapid deep-cycle recovery.

Highlights

  • 12V 5Ah capacity keeps APC SUM3000RMXL2U running during outages
  • Maintenance-free lead-acid design removes fluid checks from routine upkeep
  • Direct RBC43 cartridge #43 fit cuts install time for technicians
  • New PowerWarehouse LEADACIDSLA43-21 unit arrives ready for immediate deployment

Specifications

BrandPowerWarehouse
ModelLEADACIDSLA43-21

Questions about this item

How do I install the PowerWarehouse LEADACIDSLA43-21 battery into the APC SUM3000RMXL2U UPS, and what step is often missed?

Power off the UPS and unplug it, remove the front bezel, slide out the old cartridge, insert the new 12V 5Ah battery cartridge fully until it clicks, replace the bezel, then power on and run the self-test to register the new RBC43 cartridge.

What maintenance or replacement will the PowerWarehouse LEADACIDSLA43-21 battery need over its service life?

The sealed lead-acid design is maintenance-free with no water topping required; plan to replace the cartridge every three to five years or when the UPS signals a battery fault, whichever comes first.

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