Batteries For Cyberpower RB1290X2 UPS, 2 X 12v, 9ah - 108wh
Please double-check that the batteries you're ordering match the ones in your unit before completing your purchase.
Please note: We only supply the batteries shown in the images. Product images of devices are shown for reference only.
Batteries for CyberPower RB1290X2 UPS – 2 x 12V 9Ah (108Wh Total)
High-quality Sealed Lead Acid (AGM) replacement battery kit designed to restore dependable backup performance for your CyberPower UPS. This complete 2-pack delivers stable power, maintenance-free operation, and a precise fit for the CyberPower RB1290X2 battery module.
Technical Specifications
Key Benefits
- Dependable Backup Power: Each battery supplies 12V 9Ah for reliable UPS performance during outages and interruptions.
- AGM Sealed Construction: Spill-proof, maintenance-free design for safe and clean operation.
- Purpose-Built Fitment: Specifically matched for the CyberPower RB1290X2 battery module.
- Durable Build Quality: Engineered for strong energy retention, service life, and consistent output.
- Easy Installation: T2 terminals support straightforward replacement using your existing wiring harness and connectors.
- Complete 2-Battery Kit: Includes both batteries needed to replace the original pack.
Compatible Models
CyberPower
Designed as a direct replacement battery kit for CyberPower RB1290X2 UPS applications.
Package & Replacement Details
Included in the Box
Warranty & Returns
- 30-Day Money-Back Guarantee
- 1-Year Warranty
Important: Reuse your existing wiring harness and connectors, as this replacement kit does not include cables.
Important Installation Notes
- Reuse your existing wiring harness and connectors from the original battery pack.
- Always follow the UPS manufacturer’s safety and installation guidelines.
- Dispose of old batteries responsibly through an approved battery recycling facility.
- Verify terminal type, dimensions, and model compatibility before ordering.
Why Choose This Replacement Kit?
This CyberPower RB1290X2 replacement battery kit is built to restore full backup protection with dependable AGM performance, exact-fit sizing, and the power capacity your UPS needs to safeguard connected equipment when the mains supply fails.
Restore Reliable UPS Protection
Order this 2-pack 12V 9Ah AGM battery kit for the CyberPower RB1290X2 and bring your UPS back to dependable working condition with long-lasting, maintenance-free backup power.
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🔋 What’s mAh All About?
🔋 What’s mAh All About?
mAh stands for milliamp hours—basically, how much "fuel" your battery can hold. A higher or lower mAh than your original battery? No worries! 🙌 It won’t affect charging or operation—just means your device might run a bit longer or shorter between charges. Still 100% compatible. Still 100% awesome. 💪✨
Before ordering please read
Before ordering please read
Ensure the original battery model number is mentioned in our product description and verify that your device model number is also listed in the description.
How to Look after your new lithium battery!!
How to Look after your new lithium battery!!
See how to look after your battery if its lithium Lithium Care
Delivery and Shipping
Delivery and Shipping
See our shipping policy and details at this link Shipping Details
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Technical Specifications
| Battery Details | |
|---|---|
| Category | UPS Backup Battery |
| Brand | CyberPower |
| Battery Model | CB129 |
| Battery Type | Sealed Lead Acid (AGM) |
| Voltage | 12V |
| Capacity | 9Ah per battery |
| Total Batteries | 2 |
| Total Energy | 108Wh |
| Terminal Type | T2 |
| Battery Dimensions | 5.95” x 2.56” x 3.7” (H: 3.94” incl. terminals) |
| Gross Weight | 5 Kg / 11.02 lbs (total for 2 batteries) |
| SKU | CB129X2-RB1290X2 |
| Compatibility | |
| Fits Brand | CyberPower |
| Confirmed Device Model | CyberPower RB1290X2 UPS |
| Fits Battery Model | RB1290X2 |
OEM Battery Cross Reference
Confirmed Compatibility
| Device Model | Original Battery | Replacement | Battery Type | Pack Qty | Terminal |
|---|---|---|---|---|---|
| CyberPower RB1290X2 UPS | RB1290X2 | CB129X2-RB1290X2 | 12V 9Ah AGM | 2 | T2 |
Replacement Pack Details
| Replacement SKU | Individual Battery Model | Voltage | Capacity | Total Energy | Dimensions Per Battery |
|---|---|---|---|---|---|
| CB129X2-RB1290X2 | CB129 | 12V | 9Ah | 108Wh | 5.95” x 2.56” x 3.7” |
Brand and Battery Reference
| Brand | Battery Pack Reference | Replacement SKU |
|---|---|---|
| CyberPower | RB1290X2 | CB129X2-RB1290X2 |
Payment & Security
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