The CyberPower 425 VA UPS proves itself as an efficient, reliable, and quiet solution for power protection, suitable for a wide array of devices including Wi-Fi gateways, Macbook Air, QNAP, and even TVs and streaming boxes.
The compact size and straightforward setup make it a versatile UPS for any home or small office. With sufficient outlets - four featuring both surge protection and battery backup, and four more with just surge protection - this unit can accommodate a variety of devices.
In terms of performance, the CyberPower 425 VA UPS stands out. It responds promptly to power interruptions, ensuring that devices remain powered on and protected. The unit delivers around 90 minutes of power for light loads like a Wi-Fi gateway, invaluable during extended power outages. For heavier loads, such as a Macbook Air or QNAP, it ensures a solid 10 minutes for a safe shutdown, which meets my expectations perfectly.
One of the highlights of this unit is its quiet operation. Even under heavy load and during charging, it maintains a low noise level. Furthermore, I haven't experienced any issues with overheating during prolonged usage, testifying to its overall reliability.
Lastly, I assume that the power efficiency of the CyberPower 425 VA UPS is adequate, as there have been no noticeable increases in energy consumption since its implementation. Additionally, I have not needed to contact customer service, indicating that the device works well and lives up to its promises.
In conclusion, the CyberPower 425 VA UPS is a top-tier choice for anyone seeking a dependable, compact, and quiet UPS for their essential devices. Whether you're dealing with frequent power interruptions or simply want to safeguard your devices from power anomalies, this UPS comes highly recommended. With its stellar performance and reliable operation, I give it a well-deserved 5-star rating.
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From the manufacturer
Uninterruptible Power Supply System
Why Do You Need a UPS System?
Even brief power outages can result in data loss or potential hardware damage. A UPS system provides battery backup power to keep your devices running during short outages and provides enough runtime to properly shut down electronics during extended outages.
Typical Applications for the ST425
Desktop Computers
Ensure seamless power to your PC and make certain you have time to safely shut down your system during a longer outage.
Home Networking/VoIP
Keep your smart-home devices connected to your WIFI during power outages and brownouts.
Personal Electronics
Don’t let the game end when the power goes out. Backup battery power keeps gaming consoles, stereos, and chargers running.
Home Theaters
Protect sensitive televisions, projectors, satellites, and cable boxes from power surges and spikes.
CyberPower Standby UPS Systems
 ST425 |  ST625U |  SL700U |  ST900U | |
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Customer Reviews
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8,188
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8,188
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8,188
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8,188
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Price
| $53.95 | $69.95 | $79.95 | $109.95 |
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Battery Power
| 425 | 625 | 700 | 900 |
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Watts
| 260 | 360 | 370 | 500 |
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Runtime (Half/Full)
| 6/1.5 Minutes | 9/2 Minutes | 9/2 Minutes | 7.5/2 Minutes |
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Battery & Surge Protected
| 4 Outlets | 4 Outlets | 5 Outlets | 6 Outlets |
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Surge Protected Outlets
| 4 Outlets | 4 Outlets | 3 Outlets | 6 Outlets |
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USB Ports
| 0 | 0 | 2 | 0 |
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Topology
| Standby | Standby | Standby | Standby |
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Wave Form
| Simulated Sine Wave | Simulated Sine Wave | Simulated Sine Wave | Simulated Sine Wave |
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Model Type
| Compact | Compact | Slim | Compact |
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Management Software
| Not Available | PowerPanel Personal | PowerPanel Personal | PowerPanel Personal |
Compare with similar items
This Item  CyberPower ST425 Standby UPS System, 425VA/260W, 8 Outlets, Compact, Black |  |  |  |  |  | |
| Price | -10% $53.95 List: $59.95 | -10% $189.95 List: $209.95 | $64.99 | $84.99 | $59.99 | $45.99 |
| Delivery | Get it as soon as Monday, May 13 | Get it as soon as Monday, May 13 | Get it as soon as Wednesday, May 15 | Get it as soon as Monday, May 13 | Get it as soon as Tuesday, May 14 | Get it as soon as Wednesday, May 15 |
| Customer Ratings | ||||||
| WiFi signal | ||||||
| Tech Support | ||||||
| Battery life | ||||||
| Value for money | ||||||
| Sold By | Amazon.com | Amazon.com | SKE Smartkey UPS | Amazon.com | SKE Smartkey UPS | SKE Smartkey UPS |
| power outlets | 8 | 12 | 6 | 4 | 6 | 4 |
| size | 425VA | 1500VA NEW | 600VA/360W | 500VA | 425VA/240W | 38.48Wh-10400mAh |
| battery charge time | 76 amps | 8 hours | — | — | — | 4 hours |
| wattage | 260 watts | 900 watts | — | 300 watts | 240 watts | 37 watts |
| voltage | 120 volts | 120 volts | 120 volts | 120 volts | 120 volts | 120 volts |
| battery composition | sealed lead acid | sealed lead acid | lead acid | sealed lead acid | sealed lead acid | lithium ion |
| weight | 3.8 pounds | 23.8 pounds | — | 6.4 pounds | 8.82 pounds | 1 pounds |
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CyberPower ST425 Standby UPS - Does It Work?
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Reviews with images
Highly Impressed
Purchased a couple of these for our home as my husband and I both work from home. Our power glitches a couple times a month for whatever reason. Not sure why but started after the city switched us to another power grid section. Anyways got these because it was annoying to lose my documentation and reboot my computer and to wait for the modem to restart. This fixed the problem. However this morning due to the heavy rains we’ve had in our area the past few weeks the power went out for 2 hours. These kept the internet 🛜 powered and the tv on the entire time. Was very impressed. Very happy with my purchase of these.
Top reviews from the United States
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Reviewed in the United States on February 23, 2021
Originally I had a Amazon Basics 400VA/255W Standby UPS at this location. But its battery failed after two years use. I could have purchased the CPS3.6-12 (12V2.9AH) battery needed to fix the Amazon Basics UPS but it cost as much as a new UPS.
So I ordered the CyberPower ST425 (425VA/260W) UPS, with fingers crossed it used a different battery. Upon arrival I checked it out and found that it uses the same battery as my old UPS. Yikes, Murphy's Law got me again.
Some details about my battery phobia: I have several UPS units in my home. Their batteries last three years at best (two years is typical). Replacement SLA batteries are normally $20 each from Amazon, so it makes sense to replace them. But the adorable little battery used in this UPS is $40 (ouch). I suspect the cost is high because it's not a common battery size.
Pros: Small Size, Ideal for low wattage equipment. Three year warranty.
Cons: The battery can be replaced but is very expensive. This situation invites more electronic landfill because users will probably throw the UPS into the trash after the battery dies.
Size: 425VAStyle: UPSVerified Purchase
The small size was perfect -- But not a fan of the 12V Battery pack used in this UPS. See Review.
Reviewed in the United States on February 23, 2021
Due to the limited room in the cabinet I have to use a compact sized UPS. Not a problem since the equipment's nominal load is only 50 watts and a small capacity UPS works fine.Reviewed in the United States on February 23, 2021
Originally I had a Amazon Basics 400VA/255W Standby UPS at this location. But its battery failed after two years use. I could have purchased the CPS3.6-12 (12V2.9AH) battery needed to fix the Amazon Basics UPS but it cost as much as a new UPS.
So I ordered the CyberPower ST425 (425VA/260W) UPS, with fingers crossed it used a different battery. Upon arrival I checked it out and found that it uses the same battery as my old UPS. Yikes, Murphy's Law got me again.
Some details about my battery phobia: I have several UPS units in my home. Their batteries last three years at best (two years is typical). Replacement SLA batteries are normally $20 each from Amazon, so it makes sense to replace them. But the adorable little battery used in this UPS is $40 (ouch). I suspect the cost is high because it's not a common battery size.
Pros: Small Size, Ideal for low wattage equipment. Three year warranty.
Cons: The battery can be replaced but is very expensive. This situation invites more electronic landfill because users will probably throw the UPS into the trash after the battery dies.
Images in this review
Top reviews from other countries
Daniel Berube
Small and perfect
Reviewed in Canada on April 26, 2024Size: 425VAStyle: UPSVerified Purchase
Gray Thompson
Good value
Reviewed in Canada on December 7, 2023Size: 425VAStyle: UPSVerified Purchase
Ed - BC, Canada
Compact Power
Reviewed in Canada on July 8, 2023Size: 700VAStyle: UPSVerified Purchase
Ed - BC, Canada
Reviewed in Canada on July 8, 2023
I am writing this review not as an end use of the actual device, but to re-purpose the battery backup’s structure, it still functions as intended, just in a different package and I believe that customers may like to see how these units work as well as how they can be modified (yes, you will void the warranty)
I make computer hard drive backups and restorations every 2 months, for myself and others I help with their operating systems, so I use an external data backup device: Startech SM2DUPE11. Previously I used an earlier model that could not do NVMe style drives but was still efficient and quick. When backing up data of any type, it is best to have a power supply that won’t fail on you else you may lose your destination drive or corrupt the source data if you have a blackout. The UPS is the answer. The duplicator needs a home, so a good solid case to carry and store it in makes sense. Last, the UPS, which I integrated into the case, adding in a couple of features and using components to replace the circuit board mounted power switch and power LED indicator light. I decided to add in a power receptacle in case I needed to plug something in while doing the backup off site.
Designing the layout on an acrylic plastic board and then drilling, cutting and filing out slots and holes, modifying the two heat sinks on the Cyberpower SL700U’s circuit board and adding in a separate 12 volt DC power supply to power two small 40 mm fans to cool those two heat sinks I shortened, all of this needed careful planning on how to arrange everything. The Startech duplicator’s power supply adapter also needed a parking stall in the layout. So after removing it from it’s case, and trying a few positions with two slimmer 6 volt batteries to power the UPS during a power outage, I had my plan.
The original Cyberpower battery was 2 inches thick, and obviously I could not use this effectively if trying to place it flat inside of the carry case I used, the Nanuk 910 case. I found a flatter, 1.3” thick, 6 volt battery to use, but I would need two of them instead of one. You can replace a 12 volt battery with two 6 volt ones if you connect them in series. This gave me the advantage of increasing the amp hour rating from the Cyberpower’s 5 amp hour 12 volt battery to 7 amp hours for the replacements. My project took a while to accumulate all the needed components, all ordered through Amazon, and once I had replaced the short battery cables on the circuit board with lengthened ones, and soldered on wires to connect the switch and LED light, I was ready to assemble.
The photos show the SL700U disassembled then it’s circuit board being put together and mounted to the underside of the acrylic plastic board. I consulted with the Startech technical support to confirm that their duplicator being placed so close to the UPS power supply would not cause any issues in its operation and they confirmed that there should be no problem.
The project is done and my SL700U powers my duplicator station, protecting this investment from power failures as well as surges during normal operation. I am pleased that I chose this particular device, the Cyberpower SL700U, as it was a great compact design that I could incorporate into my plan and provide power for the nominal 60 watt power usage of the duplicator. This should prove me with many years of service.
Hope this helps you decide if the SL700U is for you.
Images in this review
AshNDust
Powers Fibre Phone Modem
Reviewed in Canada on April 11, 2024Size: 425VAStyle: UPSVerified Purchase
