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CyberPower

CyberPower ST425 Standby UPS System, 425VA/260W, 8 Outlets, Compact, Black

  • Based on 11,106 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Jun 25
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Style: Standby


Size: 425VA


Features

  • 425VA/260W Standby Battery Backup Uninterruptible Power Supply (UPS) System uses simulated sine wave output to safeguard home office and entertainment needs, including computers, gaming consoles, and broadband routers
  • 8 NEMA 5-15R OUTLETS: Four battery backup & surge protected outlets; Four surge protected outlets; INPUT: NEMA 5-15P plug with five foot power cord
  • ADDITIONAL FEATURES: LED status light indicates Power-On and Wiring Fault, transformer-spaced outlets
  • GREENPOWER UPS HIGH EFFICIENCY DESIGN: Reduces power consumption by utilizing a compact charger and power inverter to create an ultra-efficient backup power system for home and office use
  • 3-YEAR WARRANTY INCLUDING THE BATTERY; $75,000 Connected Equipment Guarantee

Description

The CyberPower ST425 Uninterruptible power supply (UPS) system provides battery backup and surge protection for lightning-induced surges and other power events that can damage electronic equipment. This unit delivers enough battery backup to power connected electronics through utility power failure and enough runtime to perform a graceful shutdown to protect against the loss of data and damage to valuable electronics during longer outages. Including a sleek design, this UPS is perfect for all your home office and entertainment needs, including computers, gaming consoles, and Broadband routers. With a $75,000 lifetime connected equipment guarantee and a three-year warranty, you can trust CyberPower commitment to the quality of this battery backup with surge protection.

Specs & Other Info

SpecificationDetails
BrandCyberPower
Battery TypeSealed Lead Acid
Dimensions3.2"D x 4.5"W x 8.3"H
Operating Voltage120 Volts
Color SchemeBlack
Weight3.8 pounds
Model NumberST425
Battery Requirement1 x 12V (included)
Release DateAugust 15, 2018
ManufacturerCyberPower Systems
OriginChina

Frequently asked questions

The CyberPower ST425 UPS can provide backup power during outages, but the exact duration depends on the total power load of the connected devices. For a setup with a moderate load like a single PC and monitor, it typically offers around 8-10 minutes of runtime, allowing you to save your work and shut down safely. For lower loads, the runtime increases.

No, the CyberPower ST425 Standby UPS System is not suitable for high-power appliances like refrigerators, space heaters, or air conditioners. It's designed for low-power devices such as computers, networking equipment, and entertainment systems. Its maximum capacity is 425VA/260W, which is not sufficient for high-power appliances.

The CyberPower ST425 Standby UPS System is designed for easy use without the need for special software for basic functionality. However, for advanced features such as power management and scheduled shutdowns, CyberPower offers a free downloadable software called PowerPanel Personal which is compatible with Windows systems. This software can provide valuable insights into power usage and battery health.

The CyberPower ST425 requires minimal maintenance. It's important to check the battery status regularly and ensure the unit is kept in a dry, ventilated area to prevent overheating. The battery typically needs replacement every 3-5 years, depending on usage and environment. CyberPower provides instructions for safe battery replacement, and it's a process that users can often do by themselves.

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Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.

The CyberPower 425 VA UPS secures critical acclaim across varied reviews for its dependable and efficient power protection, appealing to a broad user base with diverse device support needs. Its compact size, straightforward setup, and quiet operation underline its suitability for both home and small office environments. Moreover, its ability to manage power interruptions gracefully, offering substantial uptime for devices during outages, contributes to its strong recommendation among users.

Pros

  • 🔌 Efficient and reliable power protection for a wide range of devices.
  • 🔇 Quiet operation, even under load or while charging.
  • 👍 Compact design with a simple setup process.
  • 💡 Adequate power backup time, with about 90 minutes for light loads and around 10 minutes for heavier loads.
  • 🌐 Offers both surge protection and battery backup across multiple outlets.

Cons

  • 🔋 High replacement cost for the battery, which may deter users from sustaining the product long term.
  • 🎚 The audible alert (beep) for power disconnection can be loud and may be intrusive for some settings.
  • 🧰 Modifications for extended battery life require technical skills, limiting accessibility for the average user.

Should I Buy It?

If you're in need of a reliable, compact UPS that can protect a variety of devices from power interruptions without causing a racket, the CyberPower 425 VA UPS is an excellent choice. Particularly suited for those with lower power requirements or those looking to provide backup for essential devices, its merits far outweigh its demerits. However, be mindful of the potentially high battery replacement cost. Overall, if the specs align with your needs, it comes highly recommended.

    • Should have bought one sooner! Great to still have internet in temporary power outages.
Style: Standby Size: 625VA
I have this connected to my fiber optic modem and internet router. I tested it and had both of them running for over an hour and didn't even get to the point where it was running low on power. You also can turn off the beeping if you use the cable that comes in the package so at least you can use your phone to surf the internet. I even bought one for an LED TV so I can watch TV as modern TVs don't just that much power. I should have bought one sooner. Just be aware that some outlets on the unit are only 'surge protected' and some allow for them to be powered. This is nice so you can exclude other devices from using power in an outage that don't need them. All outlets on it though do power from surges which is great. ... show more
Reviewed in the United States on June 20, 2025 by Amaz0n Customer25
    • Real life test was successful. I’ll be getting a couple more!
Style: Standby Size: 425VA
The electricity went out very briefly a moment ago. It’s the first chance I’ve had to see if it does work. And it absolutely does. I have a Mac Mini M4, 6 external desktop drives, and a monitor on the UPS side of the device. When the electricity failed, the unit gave a single beep, alerting me and giving me time to turn on the monitor and begin shutting down. Luckily it all came back on before that was necessary. But it would absolutely would have allowed for that much time. It’s affordable and well made by a solid company! I’m going to get a couple more for another cluster of computers. ... show more
Reviewed in the United States on June 17, 2025 by J Schraffenberger
    • Worth the price
Style: Standby Size: 625VA
Power loss and surges, I use on the desktop computer and living room TV. The price is reasonable and there is no setup. Just plug into an electrical outlet and then plug the computer, TV, etc. into the four-battery supported and surge protected outlets. The other four outlets are only surge protected. Standard charge time is eight hours for the battery to be fully operational. Can watch TV or use the computer until the battery is drained if you choose to do so. Works well and have been using for many, many years. ... show more
Reviewed in the United States on June 4, 2025 by LTB
    • Low power rating
Style: Standby Size: 700VA
Excellent product, keeps my electronics running through power surges and outages! I've noticed though that it does not like when I run two consoles at once, guessing it can't handle the power load. I was playing on my Xbox one and had to boot up my PS5 real quick, and the UPS started making these long beeps, different than the noise it makes when it loses power. I lost my guide though so I'm assuming it's letting me know I'm using more power than it can handle? It stopped after I shut my PS5 off. ... show more
Reviewed in the United States on April 30, 2025 by Brienne E
    • Reliable Backup Power! Great Value in the CyberPower ST425
Style: Standby Size: 425VA
I recently purchased the CyberPower ST425 Standby UPS System, and it's exactly what I needed for protecting my electronics. This compact unit offers 425VA/260W of backup power, which is perfect for keeping my essential devices running during short power outages or preventing data loss from unexpected surges. With 8 outlets, I have plenty of space to plug in my computer, monitor, modem, and other peripherals. The compact size is a major plus – it fits neatly under my desk without taking up much space. The black finish is also sleek and blends in well. Setup was incredibly easy; I just plugged it in and connected my devices. It provides peace of mind knowing that my equipment is protected from power fluctuations and that I'll have a few minutes of backup power to save my work and shut down properly during an outage. For anyone looking for an affordable, reliable, and compact UPS to protect their valuable electronics, the CyberPower ST425 is an excellent choice. It's a great value for the features it provides. ... show more
Reviewed in the United States on April 25, 2025 by Seth Green
    • Reliable support at an affordable cost.
Style: Standby Size: 425VA
Solid backup at a reasonable price. It is essential to prepare for summer storms, as power outages can be particularly hard on your electronic equipment. I have my modem and laptop connected, and when the power goes out, all my equipment remains on and protected.
Reviewed in the United States on June 12, 2025 by D.L.R.M.
    • Peace of mind for a modest price.
Style: Standby Size: 625VA
I bought this UPS unit to supply electricity to my powered recliner in the event of a power failure. I experienced such a power failure a couple of years while i was sitting in the chair in a partially reclined position. Since the footrest was automatically extended, I had no easy way to get out of the chair by myself (my wife helped pull me out). I should have bought this UPS then, but I put it off. A few weeks ago, I was forced to take action. I was sleeping in the recliner for a couple weeks due to back injury when we got a warning about an ice storm headed our way the next day. I wasted no time in placing the order for this unit and Amazon responded by getting it to me the next day. After fully charging the battery, I tested it by unplugging the UPS from the wall and running the recliner up and down while no one was in it. That worked fine, so I got in and did full recline followed by full upright, which also went off without a hitch. There is a tone that sounds every few seconds when the power goes out, which switches to several times per second when the battery is nearly depleted. This is the only way to know if it is time to stop using the UPS to power the recliner until the battery has been recharged. The UPS appears to have ample power to take care of the recliner for many days. Its relatively small footprint and discrete height helps it to remain fairly inconspicuous in our family room. It met my needs in full and I only wish I had bought it sooner. ... show more
Reviewed in the United States on February 23, 2025 by humath
    • Fits perfectly.
Style: Standby Size: 700VA
Review Image by William Cooper William Cooper
The unit wouldn’t come on when plugged in. Found the reset button hiding in the back and now powered on waiting for a power outage. The slim design is perfect for my space. Bought this for my internet modem which is in wall box. We experience short outages which cuts out the internet. The unit fits perfectly and should stop the interruptions. ... show more
Reviewed in the United States on May 30, 2025 by William Cooper William Cooper

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