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Black rectangular 12V lead-acid UPS battery with two cells and terminal connectors

Battery Technology Inc.

Battery Technology Inc. RB1270X2C 12V 2-Cell Lead Acid UPS Battery

SKU CH-DCKQ-FP4QD

A 12V two-cell lead-acid battery for CyberPower CST135XLU, CP900AVR and CP1200AVR UPS units

  • Compatible with CyberPower CST135XLU UPS units
  • Works with CP900AVR and CP1200AVR models
  • 12 V lead-acid chemistry for UPS backup power
  • Two-cell design matches RB1270X2C specifications

Compatible 12V UPS Replacement Battery

This 12-volt, two-cell lead-acid battery serves as a direct replacement for the CyberPower RB1270X2C module. It restores backup power to CST135XLU, CP900AVR and CP1200AVR uninterruptible power supply units. The unit arrives new and ready for installation in compatible systems.

Practical Limits of Lead-Acid UPS Chemistry

Lead-acid cells deliver reliable standby power but lose capacity gradually with age and temperature extremes. Runtime depends on the connected load and the UPS inverter efficiency, not on the battery alone. The chemistry is unsuited for deep-cycle or frequent full-discharge applications. Buyers needing longer runtime or lithium-based chemistry should consider alternative solutions.

Highlights

  • Compatible with CyberPower CST135XLU UPS units
  • Works with CP900AVR and CP1200AVR models
  • 12 V lead-acid chemistry for UPS backup power
  • Two-cell design matches RB1270X2C specifications

Specifications

No published specifications for this item yet.

Questions about this item

Which CyberPower UPS models does the RB1270X2C 12V battery support?

This 12V 2-cell lead acid battery replaces the OEM RB1270X2C in CyberPower CST135XLU, CP900AVR and CP1200AVR units.

What runtime can I expect from the 12V 2-cell pack in a CP900AVR?

Runtime depends on the connected load; the 12V pack restores the original capacity for the CP900AVR, CP1200AVR or CST135XLU.

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