CyberPower ST425 Standby UPS Battery Backup and Surge Protector
4.4Editor score
425VA output capacity
Simulated sine wave
Eight outlet protection
In this guide
Protecting your valuable electronics from power outages and surges is essential for any modern setup. A reliable uninterruptible power supply ensures your devices stay online during interruptions.
We analyzed ten top CyberPower models based on capacity, output type, and protective features. Our list covers everything from budget-friendly options to high-performance systems.
Each pick highlights key strengths and ideal use cases for different needs. Please note that product availability and pricing may change frequently online.
Top 3 Picks for Best Cyberpower UPS Battery
CyberPower CP1500PFCLCD PFC Sinewave UPS Battery Backup and Surge Protector
4.5Editor score
1500VA PFC sinewave
Color LCD display
USB charge ports
CyberPower CPS1500AVR Intelligent LCD UPS Battery Backup
4.5Editor score
1500VA server protection
10 foot cord
Optional remote mgmt
Top 10 Best Cyberpower UPS Battery in 2026 Compared
This side-by-side comparison highlights the key specifications and capabilities of each model to help you find the right fit for your specific power protection needs.
ProductsSpecificationsEditor scorePrice
Editor's Choice
CyberPower CP1500PFCLCD
1500VA 1000W
PFC Sinewave
6 Battery Outlets
Color LCD Panel
4.5Editor score
Editor's Choice
CyberPower CP1500AVRLCD3
1500VA 900W
Simulated Sine
6 Battery Outlets
Color LCD Panel
4.5Editor score
Best Premium
CyberPower EC850LCD
850VA Capacity
ECO Mode Outlets
12 Outlets
LCD Panel
4.4Editor score
CyberPower ST425
425VA 260W
Simulated Sine
4 Battery Outlets
LED Status Lights
4.4Editor score
CyberPower RB1290
12V 9Ah Battery
User Installable
Sealed Lead Acid
18 Month Warranty
4.6Editor score
CyberPower RB1290X2
Two 12V 9Ah
Replacement Cartridge
User Installable
18 Month Warranty
4.6Editor score
CyberPower AVRG900LCD
900VA 480W
Simulated Sine
Data Line Protect
LCD Panel
4.6Editor score
CyberPower RB1280X2B
Two 12V 9Ah
Sealed Lead Acid
User Installable
18 Month Warranty
4.6Editor score
CyberPower RB12170X2A
Two 12V 17Ah
High Capacity
User Installable
18 Month Warranty
4.8Editor score
CyberPower CPS1500AVR
1500VA 900W
Simulated Sine
Optional Remote Mgmt
10ft Power Cord
4.5Editor score
1. CyberPower CP1500PFCLCD – Best Overall Cyberpower UPS Battery
CyberPower CP1500PFCLCD
1500VA 1000W
PFC Sinewave
Color LCD Panel
6 Battery Outlets
This model stands out as the top pick for critical power protection due to its robust PFC Sinewave output and comprehensive monitoring features. It is rated highly by users who need reliable backup for sensitive electronics like workstations and network gear.
Pros
- Pure sine wave output
- Comprehensive LCD display
- USB Type-C port
- High equipment guarantee
Cons
- Higher price point
- Heavy unit weight
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The Pure Sine Wave output ensures compatibility with Active PFC power supplies, which is crucial for modern computers that may shut down unexpectedly with simulated waves. The color LCD panel offers real-time status updates including load and battery levels, keeping you informed without needing software.
While it is heavier and more expensive than some alternatives, the investment pays off in reliability and protection. The six battery-backed outlets and six surge-only outlets provide ample coverage for a full desktop setup along with peripherals and networking equipment.
If you prioritize data integrity and hardware safety, this unit is the clear choice. It is ideal for home offices and small businesses that cannot afford downtime or equipment damage from power irregularities.
Superior Power Output Quality
The PFC Sinewave technology delivers clean power similar to wall outlets, protecting sensitive electronics from distortion that could cause crashes or hardware failure.
Comprehensive Monitoring
The color LCD panel tilts for better viewing and provides immediate alerts on potential issues before they impact your connected equipment or cause unplanned downtime.
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2. CyberPower ST425 – Best Value Cyberpower UPS Battery
CyberPower ST425
425VA 260W
Simulated Sine
LED Status Lights
4 Battery Outlets
The ST425 is an excellent entry-level option for users who need basic backup for small devices like routers or modest desktop systems. It delivers reliable protection at a fraction of the cost of higher-end models.
Pros
- Very affordable price
- Compact design
- GreenPower efficiency
- Basic surge protection
Cons
- Low power capacity
- Basic output waveform
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Its GreenPower efficiency design helps reduce overall power consumption, making it an eco-friendly choice for light duty use. The simulated sine wave is sufficient for most standard equipment that does not require active PFC power supplies.
The compact form factor saves desk space while the LED indicators keep you aware of power status at a glance. It is a practical solution for safeguarding gaming consoles or home entertainment setups that need brief runtime during short outages.
For tight budgets where critical server protection is not required, this unit offers the best balance of cost and basic functionality. It ensures you can save work and shut down safely without a total power loss.
Efficient Power Design
The GreenPower high efficiency design uses a compact charger and inverter to minimize energy usage while maintaining reliable backup capabilities for home and office environments.
Simple Status Monitoring
LED status lights clearly indicate Power-On status and wiring faults, providing essential safety feedback without the complexity of a digital display screen.
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3. CyberPower CPS1500AVR – Best Premium Cyberpower UPS Battery
CyberPower CPS1500AVR
1500VA 900W
10ft Power Cord
Optional Remote Mgmt
Simulated Sine
This model is designed for department workgroup servers and telecom installations where reliable power is paramount. It offers a robust 1500VA capacity to keep critical networking infrastructure online during power events.
Pros
- Long power cord
- Server grade reliability
- Remote management ready
- High surge guarantee
Cons
- Premium price tag
- Simulated sine output
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The ten foot power cord provides installation flexibility, allowing you to plug in easily without needing an extension cord in tight server racks. It includes automatic voltage regulation to correct minor fluctuations and preserve battery life for longer use.
Optional remote management via the RMCARD205 allows administrators to monitor the unit remotely, which is vital for IT professionals managing distributed systems. The high connected equipment guarantee reflects the confidence in its protective capabilities.
Ideal for business environments that need reliable protection without active PFC compatibility, this unit ensures servers and telecom gear stay powered. It is a strong choice for those prioritizing uptime and infrastructure safety.
Extended Cable Length
The 10-foot power cord offers greater installation flexibility in server rooms or telecom closets where outlet placement might be distant from the equipment.
Advanced Management Options
Optional remote management cards enable administrators to track status and control the UPS remotely, ensuring high availability for critical network and server hardware.
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4. CyberPower CP1500AVRLCD3 – Best for Networking
CyberPower CP1500AVRLCD3
1500VA 900W
Intelligent LCD
Type-C Port
12 Outlets
The CP1500AVRLCD3 offers a high number of outlets and modern USB charging capabilities, making it a versatile choice for busy home offices. It protects workstations and networking devices with a solid 1500VA capacity.
Pros
- High outlet count
- LCD status screen
- Type-C charging
- Automatic AVR
Cons
- Simulated sine wave
- Large footprint
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Its intelligent LCD panel displays immediate and detailed information on power conditions, alerting you to issues before they affect critical equipment. The inclusion of a Type-C port allows for fast charging of modern mobile devices without needing separate adapters.
Automatic voltage regulation corrects minor fluctuations automatically, which extends battery life by reducing unnecessary switching during grid disturbances. This balance of capacity and monitoring features makes it a reliable daily driver for general computing tasks.
For users needing ample outlets and modern charging options, this model is an excellent choice. It ensures your entire setup remains protected and accessible even during unexpected power interruptions.
Versatile Charging Options
Integrated USB charge ports including a Type-C port allow you to quickly charge phones and tablets during outages without needing additional power sources.
Detailed Power Monitoring
The color LCD panel provides comprehensive real-time data on battery health and power status, helping you manage your equipment effectively.
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5. CyberPower EC850LCD – Best Eco-Friendly Cyberpower UPS Battery
CyberPower EC850LCD
ECO Mode Outlets
Multi-Function LCD
12 Total Outlets
PowerPanel Software
This unit distinguishes itself with an ECO mode that automatically cuts power to peripherals when the main computer is off or sleeping. This feature helps save energy and reduce costs over time without sacrificing essential protection.
Pros
- Auto-off ECO mode
- Comprehensive LCD
- PowerPanel software
- Affordable mid-range
Cons
- No Type-C charging
- Standard output type
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The multifunction LCD panel provides clear visibility into battery and power conditions, ensuring you are always informed. It includes dedicated outlets for both backup and surge protection, offering flexibility for your various devices.
Free PowerPanel management software allows you to monitor and control the UPS via your computer, adding a layer of convenience to your setup. It is a practical choice for environmentally conscious users who want smart power management.
If you are looking to reduce energy waste while maintaining reliable backup, this model is ideal. The ECO mode adds unique value for those with multiple peripherals that draw power even when idle.
Energy Saving Features
The ECO mode automatically turns off power to connected peripherals when the main device is off, significantly reducing overall energy usage and costs.
Smart Software Control
Free PowerPanel personal software enables you to manage settings and monitor power status directly from your connected computer for added convenience.
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6. CyberPower RB1290 – Best Replacement Battery
CyberPower RB1290
12V 9Ah Battery
Sealed Lead Acid
User Installable
Maintenance Free
When your existing UPS battery loses capacity, this cartridge restores power quickly and conveniently. It is designed for user installation without technical expertise, making it accessible for anyone needing a replacement.
Pros
- Quick user install
- Pre-assembled cartridge
- Reusable packaging
- Affordable upgrade
Cons
- Short warranty
- Compatibility specific
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The sealed lead-acid design is maintenance-free, meaning you never need to add fluids or manage levels. It is pre-assembled and compatible with several popular CyberPower models, ensuring a reliable fit.
Each cartridge comes in reusable packaging designed for safe transport of expired batteries to recycling centers. This thoughtful design helps users manage waste responsibly while extending the life of their UPS unit.
If your device no longer holds a charge, this is the ideal solution. It is cost-effective and straightforward, allowing you to restore your system to full protection without buying a new unit.
Easy Replacement Process
The user-installable cartridge design allows for quick setup without needing professional help, ensuring minimal downtime for your power protection system.
Eco-Friendly Packaging
The packaging is reusable for returning expired batteries to recycling centers, supporting responsible waste management for your power system components.
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7. CyberPower RB1290X2 – Best Replacement Bundle
CyberPower RB1290X2
Two 12V 9Ah
Sealed Lead Acid
User Installable
18 Month Warranty
This cartridge includes two sealed lead-acid batteries to restore life to systems that require dual battery configurations. It is perfect for models that have weak or completely depleted internal batteries and need a significant capacity boost.
Pros
- Two battery pack
- High capacity boost
- Pre-assembled
- Easy install
Cons
- Higher cost
- Fit specific models
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Installation is straightforward and user-friendly, with each cartridge pre-assembled for quick setup. It fits several specific CyberPower models, ensuring reliable compatibility with your existing equipment without needing adapters.
The included packaging is reusable for delivering expired batteries to recycling centers, which helps keep your workspace clean and ensures proper disposal. This makes maintenance simple and environmentally responsible.
If your unit supports dual batteries, this option maximizes runtime and reliability. It is the best choice for restoring power capacity in compatible models efficiently and cost-effectively.
Dual Battery Capacity
The dual battery configuration provides increased runtime and backup power for systems requiring multiple batteries to maintain full operational capacity.
Simplified Maintenance
User-installable and pre-assembled design ensures that replacing old batteries is quick and requires no specialized tools or technical knowledge.
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8. CyberPower AVRG900LCD – Best Data Protection
CyberPower AVRG900LCD
900VA 480W
Data Line Protect
Simulated Sine
LCD Panel
This unit is ideal for desktop computers and networking devices that require data line protection against surges. The 900VA capacity is suitable for smaller workstations needing reliable backup for a short duration.
Pros
- Line surge protection
- LCD visibility
- Six backup outlets
- Automatic AVR
Cons
- Limited power
- Small capacity
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Data line protection prevents power surges traveling through telephone lines from damaging electronics, adding a layer of safety beyond electrical outlets. The LCD panel provides immediate details on battery and power status to keep you informed.
With six battery backup and surge protected outlets, it handles essential peripherals effectively. The automatic voltage regulation helps correct minor power fluctuations without draining the battery unnecessarily.
If you need to protect both power and data lines, this is a strong option. It is well-suited for home offices and small setups where comprehensive connectivity protection is valued.
Complete Connectivity Safety
The included data line protection guards against surges entering through telephone lines, safeguarding your electronics from broader electrical disturbances.
Reliable Status Updates
The intelligent LCD panel displays immediate and detailed information on battery and power conditions, ensuring you are aware of system health at all times.
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9. CyberPower RB1280X2B – Best Dual Replacement
CyberPower RB1280X2B
Two 12V 9Ah
Maintenance Free
User Installable
Reusable Packaging
This cartridge restores life to specific CyberPower models that have depleted internal batteries using two sealed lead-acid units. It is designed for easy user installation to get your system running again quickly.
Pros
- Dual battery solution
- User installable
- Reusable packaging
- Pre-assembled
Cons
- Model specific fit
- Medium cost
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Each cartridge is pre-assembled to simplify the replacement process significantly. The packaging is reusable for delivering expired batteries to recycling centers, ensuring that waste is managed responsibly without extra hassle.
The sealed lead-acid technology provides high surge currents and robust power-to-weight ratios for effective protection. It is a maintenance-free solution that ensures your UPS continues to function correctly over time.
If you own a compatible unit and need a reliable dual battery replacement, this is the recommended choice. It ensures your power system remains effective without complicated installation steps.
Dual Battery Solution
Two sealed lead-acid batteries work together to provide robust backup capacity, ensuring your system has enough power to handle outages reliably.
Efficient Setup
User-installable design and pre-assembled components make replacing old batteries quick and straightforward for non-technical users.
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10. CyberPower RB12170X2A – Best High Capacity Battery
CyberPower RB12170X2A
Two 12V 17Ah
User Installable
Sealed Lead Acid
Pre-assembled
For PR1500 series models, this cartridge provides a high 17Ah capacity that significantly extends backup runtime. It is ideal for users who need longer protection time during extended power interruptions.
Pros
- High 17Ah capacity
- Long runtime
- Easy installation
- Durable design
Cons
- Heavy weight
- Higher cost
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Each cartridge is pre-assembled and user-installable, making it easy to replace aging components. The sealed lead-acid batteries provide reliable performance and high surge currents to keep your equipment safe.
The packaging is reusable for recycling expired batteries, ensuring responsible disposal without extra effort. This thoughtful design supports environmental responsibility while maintaining the functionality of your UPS unit.
If you need maximum runtime for your specific model, this is the best choice. It ensures your system remains online longer during critical events, providing peace of mind for important tasks.
Extended Runtime
The high 17Ah capacity provides significantly longer backup time compared to standard batteries, ensuring your equipment stays powered during extended outages.
Easy Replacement
Pre-assembled and user-installable design simplifies the process, allowing you to restore your UPS capacity quickly without professional assistance.
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Buying Guide – How to Choose the Best Cyberpower UPS Battery
Selecting the right UPS involves balancing power capacity, waveform type, and specific features for your setup.
VA and Watt Capacity
VA (Volt-Ampere) and Watt ratings indicate how much load the unit can handle. Ensure the total wattage of your connected equipment does not exceed the UPS watt rating to maintain safe operation.
Choose a capacity that matches your device requirements to prevent overloading and ensure sufficient runtime during power outages.
Output Waveform
Active PFC power supplies require Pure Sine Wave output to function correctly, while others work with Simulated Sine Wave. Check your equipment specs before purchasing.
Select a waveform compatible with your devices to avoid shutdowns or hardware damage during battery operation.
LCD vs LED Display
LCD panels provide detailed real-time information about battery health and load, while LED lights offer basic status indication. LCD models are better for monitoring.
Opt for an LCD if you need comprehensive status updates, or choose LED for basic, cost-effective monitoring.
Number of Outlets
Count the number of devices you need to protect. Some units separate backup outlets from surge-only outlets, giving you more flexibility for non-critical gear.
Select a unit with enough backup outlets to cover your critical hardware while leaving room for surge-only connections.
Voltage Regulation (AVR)
Automatic Voltage Regulation corrects minor power fluctuations without draining the battery. This feature extends battery life and protects equipment from voltage spikes.
Ensure the UPS has AVR if you live in an area with unstable power grids to maintain reliable protection.
USB Charging Ports
Modern UPS units often include USB ports for charging phones or tablets during outages. Look for Type-C ports for faster charging speeds.
Choose a model with USB ports if you need to keep mobile devices charged for communication during emergencies.
Software Compatibility
Power management software allows your computer to shut down safely when the battery runs low. Check for free software downloads included with your purchase.
Verify that the manufacturer provides compatible software for your operating system to automate safe shutdown procedures.
Warranty and Guarantee
Connect equipment guarantees protect your electronics if the UPS fails to work as expected. A longer warranty on the battery itself also reduces long-term costs.
Prioritize models with strong guarantees and battery warranties to maximize the value and reliability of your investment.
How to Use and Care for Your Cyberpower UPS Battery
Proper placement is key for ventilation and safety. Position the unit in a cool, dry area away from direct sunlight or heat sources to maintain optimal battery performance.
Perform regular self-tests to ensure the battery responds correctly to power loss. Most units allow you to simulate an outage to verify that connected equipment transitions smoothly.
Monitor the battery status via the LCD panel or software. Replace the battery when the system indicates low capacity or every three to five years for consistent protection.
Frequently Asked Questions
How do I know if my computer needs a Pure Sine Wave UPS?
If your computer power supply has Active Power Factor Correction (PFC), it requires a Pure Sine Wave output. You can check the label on your PSU or the manufacturer's manual to confirm this requirement before purchasing.
How long will the battery last during a power outage?
Runtime depends on the load connected and the unit's capacity. Generally, larger units like the CP1500 series provide longer durations for critical systems than smaller ones like the ST425.
Can I use a replacement battery cartridge myself?
Yes, most CyberPower cartridges are designed for user installation. They come pre-assembled with instructions to help you swap out old batteries quickly and safely.
What is ECO Mode on a UPS?
ECO Mode automatically cuts power to connected peripherals when the main computer is turned off or sleeping. This feature helps save energy and reduce overall electricity costs.
Do these units protect phone lines?
Some models include data line protection which guards against surges traveling through telephone or DSL lines. Always check the specs to confirm if this feature is included.
How do I dispose of an old UPS battery?
UPS batteries are lead-acid and must be recycled properly. Many CyberPower models come with reusable packaging to help you transport expired batteries to recycling centers safely.
Why does my UPS keep beeping?
Beeping usually indicates a low battery, overload, or surge condition. Check the display panel for specific error codes to identify the cause of the warning sound.
Is the warranty valid for the battery?
Most CyberPower UPS units include the battery in the warranty period. Always review the specific product details to confirm if the battery is covered separately or together with the unit.
Final Thoughts on Choosing the Best Cyberpower UPS Battery
Our top picks cover a range of needs from basic home office protection to robust server room solutions. The CP1500PFCLCD leads with pure sine wave capability, while the ST425 offers incredible value for lighter loads.
Prioritize compatibility with your power supplies and consider future expansion needs. Selecting the right waveform and capacity ensures your investment remains useful as your setup evolves.
Always check current availability and pricing before making a final decision to ensure you get the best deal. Reliable power protection is a small investment that safeguards your valuable digital assets.