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SigmasTek  |  SKU: BW-1348

CyberPower RB1290X4C Compatible SLA High Performance Replacement Battery Set 23.98 lb

21% off
New arrival
Sale price $130.99 USD Regular price $164.99
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Package of 4 replacement 12V 9AH batteries for CyberPower RB1290X4C
AGM sealed battery technology for enhanced performance
UL certified for trusted quality and safety
Compatible with original UPS configuration using F2 terminals
Ships fast with a 1-year warranty
In stock

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Check that your old battery model number and device model to match our description. This makes sure they work together.


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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.


Volts & Amps

12 Volts | 9 AH

Terminal Type

F2

CyberPower RB1290X4C Replacement Batteries (4-Pack)

Restore reliable backup power to your CyberPower RB1290X4C cartridge with this 4-pack of replacement UPS batteries engineered for compatibility and consistent performance. Built using AGM (Absorption Glass Mat) sealed battery technology and SLA chemistry, these batteries provide a maintenance-free solution to keep your UPS running through outages and disturbances. This replacement UPS battery kit is ideal for users who need dependable runtime for servers, networking gear, and other critical equipment.

Key Specifications

  • Package contains: 4 batteries
  • Chemistry: SLA Chemistry
  • Technology: AGM Technology (Absorption Glass Mat)
  • Guaranteed compatibility with original battery set
  • Warranty: 1-year Warranty
  • Volts: 12 V
  • Amp Hours: 9 AH
  • Weight: 24.2 Lbs (total pack weight as listed)
  • Length: 5.95 In
  • Width: 2.56 In
  • Height: 3.7 In
  • Terminal: F2
  • UL (Underwriters Laboratories) certified
  • Shipping Methods: UPS Ground and USPS; we ship in 1 business day for all in-stock items
  • Brand/Supplier context: SigmasTek referenced in spec sheets

Benefits

This high-performance UPS battery kit offers long-lasting battery life and dependable performance for the CyberPower RB1290X4C cartridge. AGM sealed technology provides excellent cycle life, low self-discharge, and resistance to shock and vibration—qualities that make these batteries suitable for rack-mounted UPS cartridges and remote cabinets. As a replacement UPS battery solution, they help minimize downtime, protect sensitive equipment, and ensure smooth shutdowns when power quality degrades.

Typical applications include UPS backup for servers, networking equipment, telecommunications, emergency power systems, and small business or home office environments. The sealed, maintenance-free design reduces service burden while delivering predictable runtime and safety certifications (UL). Installation requires placing the new batteries in the original configuration and reusing existing cables and hardware. Always verify the dimensions listed before ordering to accommodate any manufacturer changes.

If you only need a single battery instead of the full 4-pack, visit the UPS Batteries by V and AH section to order the specific cell. Our customer service team is available to assist via email, chat, or toll-free at (800) 657-1303 for compatibility questions, installation tips, or expedited shipping requests.

Ready to upgrade your UPS reliability? Purchase this long-lasting, high-performance UPS battery 4-pack for the CyberPower RB1290X4C today and protect your equipment from unexpected power interruptions.

Technical Specifications

Voltage12 Volts
Amp Hours9 AH
Terminal TypeF2
Length (in.)5.95
Width (in.)2.56
Height (in.)3.7
Weight (lb.)23.96

Product Highlights

  • Brand Replacement : SLA Battery
  • Manufacturer: SigmasTek
  • Product Type: UPS Batteries
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

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