CyberPower RB1290X4J 12V/9Ah UPS Replacement Battery Cartridge

The CyberPower RB1290X4J is a replacement battery cartridge that returns compatible CyberPower UPS systems to the runtime and reliability they delivered on day one. Inside the cartridge sit four 12-volt, 9-amp-hour sealed lead-acid batteries that arrive prewired and ready to work, so you spend less time with tools and more time protected.

Installation feels straightforward because the cartridge slides into place exactly the way the original did. There is no need to handle individual cells, manage loose cables, or top off fluids. Once the swap is complete, your UPS can again safeguard servers, network switches, workstations, or home entertainment gear against unexpected power loss and voltage fluctuations.

CyberPower includes reusable packing material that lets you ship the spent batteries to a recycling center without searching for a suitable box. This small touch keeps hazardous materials out of landfills and removes one more chore from your task list.

The RB1290X4J fits naturally in settings that cannot afford downtime, such as small business server closets, point-of-sale stations, and home offices that host sensitive electronics. An 18-month warranty on materials and workmanship offers additional peace of mind once the cartridge is in service.

• Four sealed lead-acid batteries, each rated at 12 V and 9 Ah
• Restores factory runtime to supported CyberPower UPS models
• Arrives as a single preassembled module for quick installation
• Leak-proof construction removes the need for fluid maintenance
• Reusable packaging simplifies responsible battery recycling
• Approximate size: 8.2 x 2.6 x 12.4 inches; weight: about 24 pounds
• Protected by an 18-month CyberPower warranty