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Three black sealed lead-acid batteries in a rectangular cartridge

CyberPower

CyberPower RB1290X3R ups replacement battery 12V 9Ah 3 pack

SKU CH-DQ9E-GSS78 MPN RB1290X3R

Three sealed lead-acid 12 V 9 Ah batteries restore power to compatible CyberPower UPS units

  • TypeBattery
  • Compatibility36V60ART2U (Also requires the RB1290X3L)
  • SpecificationsBattery Type: Sealed Lead-Acid Battery Size: 12V/9Ah User Re
  • FeaturesThe RB1290X3R UPS Replacement Battery Cartridge restores lif
  • Dimensions7.60" x 13.10" x 3.20"
  • Weight18.00 lbs.
  • Restores UPS runtime with certified 12V 9Ah sealed lead-acid cells
  • Three-battery cartridge replaces depleted units in compatible CyberPower systems
  • Pre-assembled design enables user installation without tools or fluid maintenance
  • Leak-proof sealed construction eliminates electrolyte handling and refill requirements
  • Ships in reusable packaging for convenient battery recycling returns

Compatible UPS cartridge

The RB1290X3R is a pre-assembled replacement cartridge designed for the 36V60ART2U UPS system. It contains three 12V 9Ah sealed lead-acid batteries that are user-replaceable and certified to meet original specifications. The leak-proof design never requires fluid maintenance. Reusable packaging is included for recycling the expired units.

Voltage and capacity match

Each battery in the pack delivers 12 volts and 9 ampere-hours, combining to the 36 volts required by the compatible UPS. This exact voltage and capacity pairing is the single specification that determines whether the cartridge will restore full runtime. Using a different voltage or ampere-hour rating would prevent the UPS from operating correctly.

Drop-in installation

The cartridge measures 7.60 by 13.10 by 3.20 inches and weighs 18.00 pounds, fitting directly into the 36V60ART2U chassis without modification. It requires the companion RB1290X3L cartridge to complete the battery string. Installation frees the UPS from depleted cells and restores backup power for connected equipment.

Highlights

  • Restores UPS runtime with certified 12V 9Ah sealed lead-acid cells
  • Three-battery cartridge replaces depleted units in compatible CyberPower systems
  • Pre-assembled design enables user installation without tools or fluid maintenance
  • Leak-proof sealed construction eliminates electrolyte handling and refill requirements
  • Ships in reusable packaging for convenient battery recycling returns

Specifications

BrandCyberPower
ModelRB1290X3R
TypeBattery
Compatibility36V60ART2U (Also requires the RB1290X3L)
SpecificationsBattery Type: Sealed Lead-Acid
Battery Size: 12V/9Ah
User Replaceable: Yes
Number of Batteries: 3
FeaturesThe RB1290X3R UPS Replacement Battery Cartridge restores life to CyberPower UPS systems that have weak or completely depleted internal batteries. The RB1290X3R contains one 12V/9AH battery, certified to meet or exceed original manufacturer specifications. This leak-proof, sealed lead-acid battery never requires replacement fluid. The pre-assembled cartridge installs easily in your CyberPower UPS system and is shipped with reusable packaging for delivering expired batteries to a suitable recycling center.
Dimensions7.60" x 13.10" x 3.20"
Weight18.00 lbs.
Shipping weight9.66 kg
Package size455 × 259 × 178 mm

Questions about this item

What runtime does the 12 V 9 Ah rating deliver in a 36 V UPS?

Three 12 V 9 Ah batteries wired in series provide the 36 V bus voltage required by the 36V60ART2U UPS; capacity remains 9 Ah, so runtime matches the original cartridge under identical load.

How does the series connection affect the 36 V system voltage?

Each battery contributes 12 V; linking all three creates the 36 V string the UPS expects, while the 9 Ah rating stays unchanged.

Will the 7.60" x 13.10" x 3.20" cartridge fit my UPS battery bay?

The pre-assembled cartridge matches the original dimensions of 7.60 by 13.10 by 3.20 inches, so it slides into the same compartment without modification.

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