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CyberPower RB1290X2 Sealed Lead-Acid Replacement Battery

BH #CYRB1290X2 • MFR #RB1290X2
15 reviews
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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

Perfect Replacement for CyberPower 1500VA

By Robert
Rated 5 out of 5
Date: 2026-09-15

The Cyberpower RB1290X2 batteries arrived in less than 48 hours after ordering. The batteries were fully charged and fit perfectly in my power backup unit. B&H photo provides good quality and service.

Work fine but expensive

By Douglas
Rated 3 out of 5
Date: 2026-03-15

These CyberPower branded batteries are direct replacements for my CyberPower UPS but after seeing the original CSB batteries inside which came with the unit when new and looking those up online, those can be found for half the cost of the CyberPower branded versions. The original CSB batteries lasted 7 years. Recommend checking which batteries are inside your UPS and see if those are available before going with CyberPower branded versions.

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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