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Sealed lead-acid UPS battery kit, rectangular block with terminal posts

Monoprice Inc.

Monoprice Inc. CyberPower RB1290X3L 9000 mAh 12 V UPS Replacement Battery

SKU CH-MFQN-68G5B

Sealed lead-acid 12 V battery kit delivers 9000 mAh for UPS backup power

  • TypeConsumer Electronics
  • 9000 mAh capacity keeps UPS running longer
  • 12 V sealed lead-acid chemistry is leak proof and maintenance free
  • CyberPower RB1290X3L kit fits 1.5 kVA units with 36 V 60 A battery cartridges
  • 18 month warranty period backs the replacement battery

CyberPower RB1290X3L 12 V UPS Replacement Battery

The CyberPower RB1290X3L is a sealed lead-acid battery kit rated at 9000 mAh and 12 V DC. It is designed as a direct replacement cartridge for compatible UPS units, offering leak-proof, maintenance-free operation. Buyers restoring backup runtime in office or home-office power protection systems will find this unit matches the original specifications. It is not suited for applications requiring higher voltage packs or larger ampere-hour capacities beyond the stated rating.

9000 mAh capacity and 36 V 60 A system context

The kit delivers 9000 mAh at 12 V per module, supporting UPS configurations such as the 1.5 kVA, 36 V, 60 A battery string referenced in the supplier data. Runtime scales with the number of modules installed in the UPS; a single cartridge provides limited headroom for extended outages. The sealed construction eliminates electrolyte maintenance but offers no user-serviceable cells. Buyers needing longer autonomy must add further cartridges as the UPS chassis permits.

Highlights

  • 9000 mAh capacity keeps UPS running longer
  • 12 V sealed lead-acid chemistry is leak proof and maintenance free
  • CyberPower RB1290X3L kit fits 1.5 kVA units with 36 V 60 A battery cartridges
  • 18 month warranty period backs the replacement battery

Specifications

BrandCYBERPOWER SYSTEMS USA
TypeConsumer Electronics

Questions about this item

Will the 12 V DC output of this CyberPower RB1290X3L kit match the voltage requirement of my existing UPS unit?

Yes, the kit supplies 12 V DC, which is the standard voltage for compatible UPS battery slots.

How can I verify the 9000 mAh capacity is delivering the expected runtime after installation?

Run a self-test from the UPS front panel or management software; the reported backup minutes should align with the 9000 mAh rating under your normal load.

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