CyberPower RB1280X2A UPS Replacement Battery Cartridge
Bottom line: The CyberPower RB1280X2A UPS Replacement Battery Cartridge ($104.99 on Amazon as of 2026-10-09): Two 12V/9Ah sealed lead-acid batteries certified to meet or exceed OEM spec; main trade-off: fits only five CyberPower models, and three of those gate on serial prefix.
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*Price sourced from Amazon.com. Last updated 2026-10-09. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Two 12V/9Ah sealed lead-acid batteries certified to meet or exceed OEM spec
- ✓ Pre-assembled cartridge installs as one piece, no service call needed
- ✓ Maintenance-free: sealed cells never require replacement fluid
- ✓ 18-month warranty against defects in materials and workmanship
- ✓ Reusable shipping packaging doubles as the return box for recycling old cells
Cons
- ✗ Fits only five CyberPower models, and three of those gate on serial prefix
- ✗ Wrong serial prefix on a CP1350AVRLCD or CP1500AVRT means it will not fit
- ✗ Lead-acid pack is heavy for its 9Ah rating compared to lithium alternatives
- ✗ 18-month warranty is shorter than the typical 3-year UPS chassis coverage
Manufacturer description
The CyberPower RB1280X2A Replacement Battery Cartridge is what you install when a CyberPower UPS starts beeping through a brownout instead of riding it out. Inside the pre-assembled cartridge are two 12V/9Ah sealed lead-acid batteries, certified to meet or exceed the original manufacturer specification, so a unit that has lost its runtime goes back to protecting the gear plugged into it. Fit is the part to get right before you order. CyberPower lists the RB1280X2A for the CP1350AVRLCD (serial numbers starting CPK), CP1500AVRT (serials starting CPE and BHH), CP1500AVRLCD (serials starting…
SpecPicks Verdict
SpecPicks scored CyberPower RB1280X2A UPS Replacement Battery Cartridge using a rating × review-volume × price-fit model applied to published specs and reviews across the power protection category. Compare with similarly-priced alternatives in the power protection category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for power protection of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Which CyberPower UPS models does the RB1280X2A fit?
CyberPower lists the CP1350AVRLCD (serial numbers beginning CPK), CP1500AVRT (serials beginning CPE or BHH), CP1500AVRLCD (serials beginning CPA), LX1500G, and CST1400G. Match the serial prefix, not just the model number.
What batteries are inside the cartridge?
Two 12V/9Ah sealed lead-acid batteries, certified to meet or exceed original manufacturer specifications. They are leak-proof and never require replacement fluid.
Can I install this myself or does it need a technician?
It is a user-installable cartridge. Each one ships pre-assembled so it goes in as a single unit rather than as loose cells.
How long is the warranty?
Eighteen months from the purchase date, covering defects in materials and workmanship under normal use and conditions.
How do I dispose of the old batteries?
The RB1280X2A ships in reusable packaging intended for carrying expired batteries to a recycling center, and includes recycling information in the box.
Key Features
- The CyberPower RB1280X2A UPS Replacement Battery Cartridge restores life to CyberPower UPS systems that have weak or completely depleted internal batteries; It comes with two 12V/9Ah sealed lead-acid batteries
- SEALED LEAD-ACID BATTERIES: Supplies high surge currents, provides robust power-to-weight ratios, and cost effective; MAINTENANCE-FREE BATTERY FLUID: Never requires replacement
- USER-INSTALLABLE CARTRIDGE: Allows for quick and convenient installation; each cartridge is pre-assembled; The RB1280X2A comes in reusable packaging for delivering expired batteries to recycling centers
- Compatible with these CyberPower models: CP1350AVRLCD (with serial numbers beginning with 'CPK'); CP1500AVRT (with serial numbers beginning with 'CPE' and 'BHH'); CP1500AVRLCD (with serial numbers beginning with 'CPA'); LX1500G and CST1400G
- 18-MONTH WARRANTY: Covers defects in materials and workmanship in the product under normal use and conditions within eighteen months of the purchase date
Full Specifications
| Brand | CyberPower |
|---|---|
| Weight | 1500g |
| Voltage | 125 volts |
| Amperage | 2 A |
| Model Name | CPS RB1280X2A Replacement Batteries |
| Unit Count | 1 Count |
| Reusability | Single Use |
| Model Number | RB1280X2A |
| Built-In Media | Battery,Installation Guide |
| Item Type Name | SLA AGM Battery |
| Item Dimensions | 6 x 8 x 3 inches |
| Antenna Location | UPS Systems |
| Battery Capacity | 9 amp_hours |
| 18-MONTH WARRANTY | Covers defects in materials and workmanship in the product under normal use and conditions within eighteen months of the purchase date |
| Battery Cell Type | Other Than Listed |
| Number of Batteries | 2 12V batteries required. |
| Warranty Description | 18 months |
| Compatible Phone Models | Universal/SmartPhones |
| Battery Cell Composition | Other Than Listed |
| SEALED LEAD-ACID BATTERIES | Supplies high surge currents, provides robust power-to-weight ratios, and cost effective; MAINTENANCE-FREE BATTERY FLUID: Never requires replacement |
Ready to buy?
CyberPower RB1280X2A UPS Replacement Battery Cartridge is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-09. Price and availability subject to change.
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