CyberPower RB1290X3B UPS Replacement Batteries

Overview

The CyberPower RB1290X3B is a replacement battery cartridge designed to restore full backup power to compatible CyberPower UPS units like the M1100XL. It contains three sealed lead-acid batteries rated at 12 volts and 9 amp-hours each, providing reliable runtime to keep your critical electronics powered during outages. The cartridge is fully assembled and ready for quick installation, making it a practical solution for maintaining uninterrupted power in data closets, small offices, and home workstations.

Key features

• Preassembled battery cartridge that simplifies replacement and reduces downtime
• Leak-proof and maintenance-free sealed lead-acid batteries eliminate the need for fluid monitoring
• Compatible with CyberPower M1100XL UPS models to ensure seamless integration
• Reusable packaging facilitates responsible recycling and compliance with disposal regulations
• Lightweight design that fits directly into the UPS battery bay without modification
• Backed by an 18-month limited warranty for dependable performance over many charge cycles

Key specs

• Battery type: sealed lead-acid
• Voltage: 12 V per battery
• Capacity: 9 Ah per battery
• Number of batteries: 3
• Dimensions: 7.8 x 5.94 x 4.13 inches (19.8 x 15.09 x 10.49 cm)
• Weight: 17.73 pounds (8.04 kg)
• Warranty: 18-month limited

Installation and setup

The RB1290X3B cartridge arrives fully assembled and prewired, allowing most users to replace the batteries quickly with basic tools. This design minimizes downtime during maintenance and helps keep your UPS system running smoothly without the need for professional service. Its direct fit into the battery bay means no modifications are necessary, making it a straightforward upgrade for existing CyberPower UPS units.

Ideal uses and environments

This replacement battery cartridge is well suited for IT managers, remote workers, and anyone relying on steady power to protect sensitive equipment and data. It works effectively in environments such as small offices, home workstations, and data closets where maintaining continuous power is critical. The maintenance-free design and reliable runtime make it a strong choice for users who need dependable backup power without frequent battery monitoring.