CyberPower ST425 Standby UPS Battery Backup and Surge Protector
4.4Editor score
425VA output for basic protection
Simulated sine wave design
Eight outlets total including surge
In this guide
Finding the right Cyberpower UPS battery ensures your critical devices stay protected during unexpected power outages and surges.
We compared ten top rated models focusing on capacity, waveform type, outlet count, and smart features to help you decide.
Each pick highlights key strengths and tradeoffs so you can match a unit to your specific setup and budget requirements.
Top 3 Picks for Best Cyberpower UPS Battery
CyberPower CP1500PFCLCD PFC Sinewave UPS Battery Backup and Surge Protector
4.5Editor score
Pure sine wave for sensitive gear
1500VA capacity supports heavy loads
Color LCD panel shows detailed status
CyberPower CPS1500AVR Intelligent LCD UPS Battery Backup
4.5Editor score
1500VA output for workgroup servers
Ten foot power cord included
Optional remote management support
Top 10 Best Cyberpower UPS Battery in 2026 Compared
The following table provides a quick side by side look at the key specifications and features across all ten reviewed models.
ProductsSpecificationsEditor scorePrice
Editor's Choice
CyberPower CP1500PFCLCD PFC Sinewave UPS
1500VA 1000W output
Pure sine wave
Twelve outlets total
Color LCD display
4.5Editor score
Editor's Choice
CyberPower CP1500AVRLCD3 Intelligent LCD UPS
1500VA 900W output
Simulated sine wave
Twelve outlets total
Color LCD display
4.5Editor score
Best Premium
CyberPower EC850LCD Ecologic UPS
850VA capacity
ECO mode outlets
Twelve outlets total
Standard LCD display
4.4Editor score
CyberPower ST425 Standby UPS
425VA 260W output
Simulated sine wave
Eight outlets total
LED status lights
4.4Editor score
CyberPower RB1290 UPS Replacement Battery
12V 9Ah battery
Sealed lead acid
User installable
For CP1000 models
4.6Editor score
CyberPower RB1290X2 UPS Replacement Battery
Two 12V 9Ah batteries
Sealed lead acid
User installable
For BRG and CP models
4.6Editor score
CyberPower AVRG900LCD Intelligent LCD UPS
900VA 480W output
Simulated sine wave
Twelve outlets total
Data line protection
4.6Editor score
CyberPower RB1280X2B UPS Replacement Battery
Two 12V 9Ah batteries
Sealed lead acid
User installable
For CP1500PFCLCD
4.6Editor score
CyberPower RB12170X2A UPS Replacement Battery
Two 12V 17Ah batteries
Sealed lead acid
User installable
For PR1500 models
4.8Editor score
CyberPower CPS1500AVR Intelligent LCD UPS
1500VA 900W output
Simulated sine wave
Eight outlets total
Optional remote card
4.5Editor score
1. CyberPower CP1500PFCLCD PFC Sinewave UPS – Best Overall Cyberpower UPS Battery
CyberPower CP1500PFCLCD PFC Sinewave UPS
1500VA 1000W capacity
Pure sine wave output
Twelve NEMA outlets
USB charge ports
This unit stands out as the top pick for its pure sine wave output which is essential for modern Active PFC power supplies.
Pros
- Pure sine wave protects Active PFC gear
- Color LCD shows detailed power info
- Two USB ports for device charging
- Automatic voltage regulation included
- Strong three year warranty coverage
Cons
- Higher cost than simulated models
- Heavier than smaller units
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It offers 1500VA capacity with twelve outlets and a color LCD that gives real time battery and load details.
While it costs more than basic models the protection it offers for servers and workstations justifies the investment for critical setups.
Choose this model if you need reliable backup for expensive electronics that cannot tolerate simulated sine wave distortion.
Pure Sine Wave Protection
The sine wave output ensures compatibility with Active PFC power supplies found in many high end computers and servers.
Smart Display Features
The color LCD panel tilts to show voltage load and battery status making troubleshooting and monitoring easier.
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2. CyberPower CP1500AVRLCD3 Intelligent LCD UPS – Best Value Backup Solution
CyberPower CP1500AVRLCD3 Intelligent LCD UPS
1500VA 900W capacity
Simulated sine wave
Twelve NEMA outlets
USB charge ports
This model offers a great balance of capacity and features for home entertainment or office use without the premium sine wave cost.
Pros
- Large capacity for home setups
- Color LCD display for monitoring
- Two USB charging ports
- Automatic voltage regulation
- Strong warranty coverage
Cons
- Simulated sine wave not for PFC
- Bulkier than compact units
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It includes twelve outlets and a color LCD that clearly displays battery status and load information during outages.
While not ideal for Active PFC gear it provides solid protection for standard computers and networking equipment.
Select this if you need high capacity backup and monitoring tools but do not require pure sine wave output.
High Capacity Backup
With 1500VA capacity this unit can keep multiple devices running long enough to save work or shut down safely.
Monitoring and Control
The intelligent LCD and free PowerPanel software let you track power quality and manage settings easily.
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3. CyberPower EC850LCD Ecologic UPS – Best for Energy Savings
CyberPower EC850LCD Ecologic UPS
850VA capacity
ECO mode outlets
Twelve NEMA outlets
Standard LCD display
This eco friendly UPS uses smart outlets to cut power to peripherals when the main device is off saving energy daily.
Pros
- ECO mode cuts peripheral power
- Twelve outlets total
- Low power consumption design
- Clear LCD status info
- Affordable mid range option
Cons
- Lower capacity than 1500VA models
- No USB charging ports
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It provides eight protected outlets and a standard LCD that shows battery and power conditions clearly.
While it has less capacity than premium units it is perfect for saving electricity on home office setups.
Pick this model if reducing energy waste is a priority and you need basic battery backup for a PC and monitor.
Automatic Power Saving
ECO controlled outlets detect when your computer sleeps or shuts down and disconnect power to connected peripherals automatically.
Compact and Efficient
The design minimizes energy draw even when idle helping you lower overall household power consumption.
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4. CyberPower ST425 Standby UPS – Best Budget Backup Option
CyberPower ST425 Standby UPS
425VA 260W capacity
Simulated sine wave
Eight NEMA outlets
LED status indicators
This unit is an affordable choice for basic protection of gaming consoles broadband routers or small home office gear.
Pros
- Low cost entry level option
- Eight outlets for multiple devices
- Simple LED status lights
- Energy efficient design
- Includes three year warranty
Cons
- Lower power capacity
- No LCD screen details
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It features eight outlets and simple LED lights to show power and fault status without complex displays.
While it lacks advanced features it delivers reliable surge protection and short term backup when needed.
Choose this if you want essential backup for low wattage devices without spending much on extra features.
Essential Protection
The eight outlets provide enough ports for a console router and modem while keeping costs low.
Efficient Design
High efficiency components reduce power consumption during normal use helping you save on electricity bills.
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5. CyberPower RB1290 UPS Replacement Battery – Best Single Cartridge Upgrade
CyberPower RB1290 UPS Replacement Battery
12V 9Ah battery
Sealed lead acid
User installable cartridge
For CP1000 series
This cartridge replaces the internal battery in compatible CP1000 series units restoring backup time without buying new hardware.
Pros
- Restores old UPS units
- Easy to install yourself
- Pre assembled cartridge design
- Recyclable packaging provided
- Solid 18 month warranty
Cons
- Compatible with limited models
- One battery only
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It comes pre assembled for easy installation and includes packaging for safe recycling of the old battery.
While it only fits specific models it is a cost effective way to extend the life of a trusted UPS.
Buy this if your CP1000 unit has lost runtime and you want a straightforward swap to keep using it.
Restore Old Units
Replacing the battery often gives your existing UPS several more years of reliable service at a fraction of new cost.
Easy Maintenance
The user installable design means you do not need tools or professional help to complete the swap.
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6. CyberPower RB1290X2 UPS Replacement Battery – Best Dual Pack for BRG Models
CyberPower RB1290X2 UPS Replacement Battery
Two 12V 9Ah batteries
Sealed lead acid
User installable cartridge
For BRG and CP units
This two pack is designed for larger UPS systems that require two batteries to maintain full runtime during outages.
Pros
- Restores units needing two batteries
- Pre assembled for quick install
- Compatible with many models
- Recyclable packaging included
- 18 month warranty coverage
Cons
- Check compatibility before buying
- Higher cost than single pack
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It supports a wide range of BRG and CP models and comes ready to install without extra assembly.
While slightly more expensive than single units it is essential for models that use dual battery trays.
Choose this if your larger UPS has lost power and you need to replace both cells to restore performance.
Dual Battery Systems
Many higher capacity units use two batteries in parallel to provide longer backup time for multiple devices.
Broad Compatibility
The RB1290X2 fits many BRG and CP series units making it a versatile upgrade option.
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7. CyberPower AVRG900LCD Intelligent LCD UPS – Best for Network Protection
CyberPower AVRG900LCD Intelligent LCD UPS
900VA 480W capacity
Simulated sine wave
Twelve NEMA outlets
Data line protection
This model adds data line protection to prevent surges from traveling through phone or modem lines into connected equipment.
Pros
- Protects telephone and data lines
- Twelve outlets for gear
- LCD status display
- Automatic voltage regulation
- Good for networking setups
Cons
- Medium capacity not for heavy servers
- No pure sine wave
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It offers twelve outlets and clear LCD info making it suitable for home offices with routers and modems.
While not designed for high power servers it provides solid backup and protection for typical networking devices.
Select this if you need to safeguard both power and data lines in a small office or home network.
Data Line Protection
Surges on telephone or coax lines can damage modems and this unit shields those ports alongside power outlets.
Network Ready
With twelve outlets it can power a modem router switch and computers simultaneously during an outage.
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8. CyberPower RB1280X2B UPS Replacement Battery – Best Dual Battery for CP1500PFCLCD
CyberPower RB1280X2B UPS Replacement Battery
Two 12V 9Ah batteries
Sealed lead acid
User installable cartridge
For CP1500PFCLCD specific
This replacement pack is tailored for the CP1500PFCLCD unit with specific serial numbers ensuring a proper fit and function.
Pros
- Exact match for CP1500PFCLCD
- Restores full backup time
- Pre assembled for easy fit
- Recyclable packaging
- 18 month warranty
Cons
- Specific serial number match
- Only two batteries
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It includes two sealed lead acid batteries that restore runtime and performance to your aging UPS system.
While it targets a specific model it is the most reliable way to keep your CP1500PFCLCD working well.
Use this if you own a CP1500PFCLCD with the matching serial prefix and need to refresh the internal cells.
Targeted Replacement
Matching the exact model ensures the batteries connect correctly and the UPS recognizes them without errors.
Restore Performance
New batteries bring back original backup times so your PC can shut down safely during long outages.
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9. CyberPower RB12170X2A UPS Replacement Battery – Best High Capacity Upgrade
CyberPower RB12170X2A UPS Replacement Battery
Two 12V 17Ah batteries
Sealed lead acid
User installable cartridge
For PR1500 models
These 17Ah batteries offer significantly longer runtime than standard 9Ah cells making them ideal for critical workloads.
Pros
- 17Ah capacity for long runtime
- Two batteries for dual tray
- Easy install design
- High customer satisfaction
- Recyclable packaging
Cons
- Fits PR1500 series only
- Higher price point
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They are made for PR1500 series units and restore full backup capability with minimal effort.
While costlier the extra capacity buys more time to save work or maintain uptime during extended outages.
Pick this if you need maximum backup duration and own a compatible PR1500 unit that supports 17Ah batteries.
Extended Runtime
The 17Ah rating means your connected devices stay powered longer giving you more time during outages.
Premium Replacement
With a high rating these cartridges are trusted for reliability and quick restoration of UPS functionality.
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10. CyberPower CPS1500AVR Intelligent LCD UPS – Best Premium Group Backup
CyberPower CPS1500AVR Intelligent LCD UPS
1500VA 900W capacity
Simulated sine wave
Eight NEMA outlets
Optional remote management
This premium unit targets workgroup servers and telecom installations with high capacity and robust surge protection features.
Pros
- High capacity for servers
- Ten foot power cord
- Optional remote card slot
- LED status lights
- Strong equipment guarantee
Cons
- Fewer outlets than some models
- No USB charging
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It includes a long ten foot cord and optional remote management for IT environments where monitoring is vital.
While it has fewer outlets it delivers strong performance for critical infrastructure and includes a large equipment guarantee.
Choose this for server rooms or small offices where uptime and remote oversight matter more than extra ports.
Server Grade Protection
The high VA and wattage support demanding loads like servers while safeguarding them from voltage issues.
Remote Management Ready
Adding a remote card allows admins to monitor and control the UPS from across the network.
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Buying Guide – How to Choose the Best Cyberpower UPS Battery
Selecting the right UPS requires matching capacity waveform type and features to your devices and environment.
Power Capacity
The VA and wattage rating tells you how much load the UPS can support during an outage. Calculate the total wattage of your devices and choose a unit with at least 20 percent headroom to ensure safe operation. Higher capacity models like 1500VA are better for desktops and servers while 425VA suits gaming consoles.
Always match capacity to load to avoid overloading the UPS which can reduce backup time or cause failure.
Waveform Type
Pure sine wave units provide clean power that mimics utility electricity and is required for Active PFC power supplies. Simulated sine wave models are more affordable but may cause issues with sensitive gear. Check your device power supply before choosing a simulated output unit.
Use pure sine wave for computers and servers to prevent shutdowns or hardware stress.
Outlet Count
Look for enough battery backed outlets for your critical gear and surge only outlets for peripherals. Some models offer up to twelve total outlets which helps keep your setup organized without extra power strips. Ensure the outlet configuration matches your plug types and spacing needs.
Count your devices and pick a unit that covers them all without overcrowding.
Display and Monitoring
LCD panels provide detailed information on battery level load and power conditions while LED lights show basic status. A color LCD can alert you to issues before they affect equipment and software often allows remote tracking. Choose a display level that fits your monitoring needs.
A clear display helps you manage your UPS more effectively during power events.
Battery Replacement
Most UPS units use sealed lead acid batteries that can be replaced when runtime drops. Check that replacement cartridges are available for your model and easy to install. Some models have a battery that lasts up to two years under normal conditions.
Plan for battery replacement every two to three years to maintain backup performance.
Protection Features
Automatic voltage regulation corrects minor fluctuations without using battery power which extends battery life. Data line protection shields modems and routers from surges on phone or coax lines. These features add value especially for networking gear and home offices.
Prioritize AVR and data protection if you connect external network devices.
Warranty and Guarantee
Most CyberPower units include a three year warranty covering the battery and equipment guarantees that compensate for damage. Longer warranties indicate confidence in build quality and protect your investment. Read the terms to understand what is covered and how claims are handled.
Choose units with strong warranties and equipment coverage for better peace of mind.
Size and Portability
Larger UPS units are heavier and take up more space which may matter in tight desks or racks. Consider the physical dimensions and cord length when placing the unit near your devices. Some models include longer cords for more flexible placement options.
Measure your space and ensure the unit fits comfortably with its power cord.
How to Use and Care for Your Cyberpower UPS Battery
Place the UPS in a well ventilated spot away from direct sunlight to prevent overheating and extend battery life. Ensure the plug fits securely and the cord is not pinched or frayed.
Test your UPS regularly using the built in self test or power off switch to verify battery function. This practice helps you catch failures before an actual outage occurs.
Replace the battery every two to three years or sooner if runtime decreases noticeably. Follow the manufacturer instructions for safe removal and recycling of the old battery.
Frequently Asked Questions
How often should I replace my CyberPower UPS battery?
Most sealed lead acid batteries last two to three years depending on usage and temperature. Test your unit regularly and replace the battery if it no longer holds charge or the UPS shows low battery warnings.
Can I use a CyberPower UPS with a gaming PC?
Yes but check if your power supply requires pure sine wave. Models like the CP1500PFCLCD provide pure sine wave which is safe for Active PFC power supplies found in many gaming rigs.
Do these UPS units protect internet routers?
Many models include surge protection for all outlets and some offer data line protection for phone and coax lines. Use a battery backed outlet for your modem and router to keep internet running during outages.
What is the difference between VA and watts in a UPS?
VA measures apparent power while watts measure real power. To find the safe load use the watt rating since it reflects actual power draw. Ensure your devices stay within the watt capacity.
How long will a UPS keep my computer on?
Backup time depends on load and battery health. A typical 1500VA unit may power a PC and monitor for ten to twenty minutes at partial load. Higher loads reduce runtime while lighter loads extend it.
Are replacement batteries easy to install?
Most CyberPower replacement cartridges are user installable with pre assembled connectors. You simply open the compartment remove the old battery and snap in the new one. The unit often guides you with labels or software alerts.
Final Thoughts on Choosing the Best Cyberpower UPS Battery
The CyberPower CP1500PFCLCD stands out as the top choice for its pure sine wave output and comprehensive monitoring features.
For budget focused users the ST425 offers essential protection while larger models like the CPS1500AVR serve workgroup needs with high capacity.
Check the latest pricing and availability before buying to ensure you get the best value for your specific setup.