CyberPower RB1290X2 Sealed Lead-Acid Replacement Battery

BH #CYRB1290X2 • MFR #RB1290X2
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CyberPower RB1290X2 Sealed Lead-Acid Replacement Battery
Key Features
  • Works with Select CyberPower UPS Systems
  • 2 x 12V / 9Ah Sealed Lead-Acid Batteries
  • Replaces Depleted Internal Batteries
  • Leak-Proof Casing
Use the CyberPower RB1290X2 Sealed Lead-Acid Replacement Battery to replace depleted internal batteries in compatible UPS systems. The 12V / 9Ah kit contains an RB1290X2 cartridge with two sealed lead-acid UPS batteries. The pre-assembled cartridge installs into select CyberPower UPS systems, and its leak-proof batteries never require replacement fluid. Its packaging can be reused to recycle the old battery.
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CyberPower RB1290X2 Overview

Use the CyberPower RB1290X2 Sealed Lead-Acid Replacement Battery to replace depleted internal batteries in compatible UPS systems. The 12V / 9Ah kit contains an RB1290X2 cartridge with two sealed lead-acid UPS batteries. The pre-assembled cartridge installs into select CyberPower UPS systems, and its leak-proof batteries never require replacement fluid. Its packaging can be reused to recycle the old battery.

CyberPower UPS Compatibility
  • BRG1350AVRLCD
  • BRG1500AVRLCD
  • LX1500GU
  • CP1350AVRLCD
  • CP1500AVRLCD
  • CST150XLU
Long Lasting Power
This sealed lead-acid replacement battery kit features leak-proof casing that prolongs its life and its fluid never needs to be replaced.
Easy Recycling
The RB1290X2 includes instructions and a reusable package for recycling your old, depleted battery.
UPC: 649532620975

CyberPower RB1290X2 Specs

Cells
2
Battery Capacity
(9 VaH)
Chemistry
Lead-Acid
Output Voltage
12 VDC
Physical
Operating Conditions
32 to 104°F / 0 to 40°C up to 95% Humidity
Dimensions
8.7 x 6.5 x 6.4" / 22.1 x 16.5 x 16.3 cm
Weight
11.79 lb / 5.35 kg
Packaging Info
Package Weight
10.85 lb
Box Dimensions (LxWxH)
7.85 x 7.15 x 6.6"

CyberPower RB1290X2 Reviews

Good replacement product

By Brian
Rated 5 out of 5
Date: 2026-06-17

After five years, the batteries in my UPS finally wore out. This replacement set (which comes with two batteries that are connected in series) allowed me to continue using the UPS.

Up and Running Again

By Michael
Rated 5 out of 5
Date: 2026-03-10

Batteries were easy to replace, and my UPS is running normally again.

See any errors on this page?

Will I need one or two of these for my ...

Will I need one or two of these for my BRG1500AVRLCD ?
Asked by: John
You would only need one CyberPower RB1290X2 Replacement battery for the BRG1500AVRLCD.
Answered by: Michael M
Date published: 2021-10-15
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