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Sealed cartridge holding four 12V 5Ah lead-acid batteries

CyberPower

CyberPower RB1250X4 UPS Battery Cartridge 4×12V 5Ah

SKU CH-1BRJ-6CZ0F MPN RB1250X4

A pre-assembled cartridge holding four sealed 12 V 5 Ah lead-acid cells restores backup power to compatible CyberPower UPS units and includes recycling packaging

  • Output Voltage12V
  • Battery TypeLead Acid Battery
  • Restores UPS runtime with four 12V 5Ah batteries
  • Meets or exceeds original manufacturer specifications for reliable performance
  • Leak-proof sealed lead-acid design requires no fluid maintenance
  • Pre-assembled cartridge enables quick and easy installation
  • Includes reusable packaging for responsible battery recycling

Purpose and audience

The CyberPower RB1250X4 is a replacement battery cartridge designed for CyberPower UPS systems that use four 12V 5Ah sealed lead-acid cells. It restores backup runtime for units whose original batteries have weakened or failed completely. The pre-assembled cartridge targets IT staff and home-office users who need a direct, manufacturer-spec swap without sourcing individual cells.

Thermals noise and power

Sealed lead-acid chemistry means the cartridge operates silently and without liquid maintenance under normal float-charge conditions. Heat output stays low during typical standby and discharge cycles because the cells are rated for the UPS's designed load profile. No fan or active cooling is required from the cartridge itself; the host UPS manages any thermal demands.

Build integration

The cartridge fits the CyberPower PR750RT2U UPS and installs as a single unit, freeing the installer from handling separate batteries or wiring. Reusable packaging is included so the depleted cells can be returned to a recycling centre. Instructions and recycling information ship in the box, and the product carries an eighteen-month warranty against defects.

Highlights

  • Restores UPS runtime with four 12V 5Ah batteries
  • Meets or exceeds original manufacturer specifications for reliable performance
  • Leak-proof sealed lead-acid design requires no fluid maintenance
  • Pre-assembled cartridge enables quick and easy installation
  • Includes reusable packaging for responsible battery recycling

Specifications

BrandCyberPower
ModelRB1250X4
Part NumberRB1250X4
Output Voltage12V
Battery TypeLead Acid Battery
Shipping weight7.71 kg
Package size478 × 366 × 163 mm

Questions about this item

How do I install the RB1250X4 cartridge into my PR750RT2U UPS and what step is often missed?

The pre-assembled cartridge slides into the UPS battery compartment; the step often missed is connecting the internal battery wiring harness before securing the front cover.

What maintenance or replacement will the sealed lead-acid batteries in this cartridge need later?

These sealed lead-acid batteries never require replacement fluid; the entire cartridge is replaced when runtime drops below acceptable levels.

What limit appears first during a sustained power outage with the four 12V 5Ah batteries?

The 5Ah capacity per cell determines total runtime; once the stored energy is depleted the UPS will shut down.

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