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Three sealed lead-acid batteries in a cartridge, 7.60 by 13.10 by 3.20 inches

CyberPower

CyberPower RB1290X3L 12V 9Ah 3-pack UPS replacement battery

SKU CH-N5J3-F831P MPN RB1290X3L

Three sealed lead-acid 12V 9Ah batteries in a pre-assembled cartridge restore runtime to compatible CyberPower UPS units

  • Product typeBattery
  • Compatible withOL1000RTXL2U, OL1500RTXL2U, BP36V60ART2U (Also requires the
  • DetailsBattery Type: Sealed Lead-Acid Battery Size: 12 V/9Ah User R
  • Key featuresThe RB1290 × 3L UPS Replacement Battery Cartridge restores l
  • Product dimensions7.6 in × 13.1 in × 3.2 in
  • Product weight18 lb (8.16 kg)
  • Restores UPS runtime with certified 12V/9Ah sealed lead-acid cells
  • Three pre-assembled cartridges install quickly without tools
  • Leak-proof design eliminates fluid maintenance for safer operation
  • Compatible with OL1000RTXL2U, OL1500RTXL2U and BP36V60ART2U units
  • Reusable packaging simplifies responsible recycling of expired batteries

Restores CyberPower UPS Runtime

This three-pack of 12V 9Ah sealed lead-acid batteries replaces depleted cells in compatible CyberPower UPS units. The pre-assembled cartridge is user-replaceable and arrives in reusable packaging for recycling the old batteries. Each unit is certified to meet or exceed the original manufacturer specifications. No fluid maintenance is ever required.

Suits OL1000RTXL2U and OL1500RTXL2U Owners

Buyers with those rackmount models can install the cartridge directly. The BP36V60ART2U extended battery module also works but requires the separate RB1290X3R pack. This set does not fit other UPS families or voltages. Users needing higher capacity or different form factors should look elsewhere.

Fits 7.60 by 13.10 by 3.20 Inch Bays

The cartridge slides into the existing battery compartment without tools and weighs 18.00 lbs for the triple pack. Reusable shipping materials simplify proper disposal of the spent units. An eighteen-month warranty covers the replacement cells. Installation instructions and recycling information are included in the box.

How it compares

Measured against everything we stock in UPS Replacement Batteries, at today’s prices. Recalculated every night.

Price $146.99
Pricier than about 82% of the 3,915 comparable items (median $39.99).

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Specifications

Product
Brand nameCyberPower
Model nameRB1290 × 3L
Product typeBattery
Size & build
Product dimensions7.6 in × 13.1 in × 3.2 in
Product weight18 lb (8.16 kg)
Shipping weight8.62 kg
Package size384 × 244 × 132 mm
Compatibility
Compatible withOL1000RTXL2U,
OL1500RTXL2U,
BP36V60ART2U (Also requires the RB1290 × 3R)

Questions about this item

Which CyberPower UPS models accept the RB1290X3L cartridge?

The cartridge fits the OL1000RTXL2U and OL1500RTXL2U directly; the BP36V60ART2U also works when paired with the RB1290X3R kit.

Can I mix the new 12V 9Ah batteries with older cells still inside the UPS?

No — replace every cell at once; mixing fresh and aged sealed lead-acid units shortens runtime and can damage the charger.

How do I confirm the replacement cartridge is working after installation?

Run a self-test from the UPS front panel; a passed test and normal runtime on battery indicate the 12V 9Ah pack is functioning.

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