Whether you’re running a small home office or a gaming powerhouse, your computer is likely your most important tool for work and play. But there’s one component that sometimes gets overlooked: the uninterruptible power supply, or UPS.
UPSs are responsible for protecting the rest of your hardware when the power goes out, but they’re also worth considering if you’re worried about a power surge or brownout damaging your computer.
Read on for our best computer UPS units.
Our Editor’s Best Computer Uninterruptible Power Supply Units Reviews
Bestseller No. 1
APC UPS 600VA / 330W UPS Battery Backup & Surge Protector, 7 Outlets (NEMA 5-15R), USB Charging Port, BE600M1 Uninterruptible Power Supply for Computers, Wi-Fi Routers, and Home Office Electronics
- KEEP YOUR COMPUTER, WI-FI AND ROUTER RUNNING THROUGH POWER OUTAGES: Supplies short‑term battery power during outages to maintain internet connectivity and allow safe shutdown of computer during power interruptions.
- POWER PROBLEMS DON'T ONLY HAPPEN DURING STORMS — 23 minutes of runtime (at 100W load) guards against outages, while surge protection shields connected devices from unexpected power events that happen even on a normal day
- PROTECT EVERYTHING ON YOUR DESK - 5 well-spaced outlets with full battery backup and surge protection, plus 2 surge-only outlets for less critical gear
- PHONE CHARGER - Keep your phone charged even when the power's out. The built-in 1.5A USB port works during outages
- EASY BATTERY REPLACEMENT KEEPS COSTS LOW — swap the internal battery in minutes when it ages out, no need to replace the whole unit (APC replacement battery APCRBC154, sold separately)
Bestseller No. 2
APC UPS Back-UPS Pro 1500VA UPS, 900W Battery Backup & Surge Protector, AVR, 10 Outlets (NEMA 5-15R), LCD, BX1500M Uninterruptible Power Supply for Computers, Wi-Fi Routers, Home Office Electronics
- 1500VA / 900W RELIABLE BACKUP POWER: The highest VA capacity available for home use; delivers short‑term battery power to keep essential devices powered during blackouts, surges, and unexpected power interruptions
- STAY CONNECTED WHEN IT MATTERS MOST: Provides up to 19 minutes of backup runtime at a 300W load—keeping computers, TVs, DVRs, Wi-Fi routers, modems, external drives, NAS systems, and smart home devices powered during outages
- TEN PROTECTED OUTLETS: Power your entire setup with 5 battery backup outlets for essential devices, plus 5 surge-only outlets for peripherals—plus built-in coaxial and Ethernet surge protection for added peace of mind
- AUTOMATIC VOLTAGE REGULATION (AVR): Corrects low voltage brownouts (88V+) and surges (+/-13%) without draining battery—boosts or trims to stable 120V. Extends runtime for blackouts; Active PFC compatible for gaming PCs
- REPLACEABLE BATTERY & ENERGY STAR UPS: User-replaceable battery (APCRBC124, sold separately) for zero-downtime swaps. ENERGY STAR certified for 92%+ efficiency, cutting energy costs vs standard UPS units
Bestseller No. 3
Amazon Basics UPS Battery Backup & Surge Protector, 400VA/255W, 6 Outlets, Uninterruptible Power Supply, Small Compact Size, Black
- Standby uninterruptible power supply (UPS) with 400VA / 255W battery backup; ideal for home networks, IoT devices, and home entertainment devices. Runtime varies based on power consumption of connected devices. At half load (200VA/127.5W), the UPS provides approximately 6 minutes of backup power, while at full load (400VA/255W), it provides approximately 1.5 minutes of backup power
- 6 outlets total (NEMA 5-15R), consisting of 3 surge-protected outlets and 3 surge-protected/battery-backup outlets
- Protects electronic devices during a power surge; provides reliable power, keeping devices powered during short outages and powered for long enough to shut down properly during extended outages
- Small compact size integrates easily into any home or office environment; 5-foot cord with NEMA 5-15P right angle and 45-degree offset plug (120V - 50Hz / 60Hz)
- Note: Power management software is available for download in the "Product guides and documents" section of this page
Bestseller No. 4
Amazon Basics UPS Battery Backup & Surge Protector, 800VA/450W, 12 Outlets, Standby Uninterruptible Power Supply, Compact, Black
- Standby uninterruptible power supply (UPS) with 800VA / 450W battery backup; ideal for home networks, IoT devices, and home entertainment devices. Runtime varies based on power consumption of connected devices. At half load (400VA/225W), the UPS provides approximately 12 minutes of backup power, while at full load (800VA/450W), it provides approximately 2 minutes of backup power
- 12 outlets total (NEMA 5-15R), consisting of 6 surge-protected outlets and 6 surge-protected/battery-backup outlets
- Protects electronic devices during a power surge; provides reliable power, keeping devices powered during short outages and powered for long enough to shut down properly during extended outages
- Small compact size integrates easily into any home or office environment; 5-foot cord with NEMA 5-15P right angle and 45-degree offset plug (120V - 50Hz / 60Hz)
- Note: Power management software is available for download in the "Product guides and documents" section of this page
Bestseller No. 5
APC Back-UPS Pro Sinewave UPS, 1500VA/900W UPS Battery Backup & Surge Protector, AVR, 10 Outlets, LCD, USB-C Charging, UL Certified, BR1500MS2 Uninterruptible Power Supply for Computers, Electronics
- 1500VA / 900W RELIABLE BACKUP POWER: The highest VA capacity available for home use; delivers short‑term battery power to keep essential devices powered during blackouts, surges, and unexpected power interruptions
- STAY CONNECTED WHEN IT MATTERS MOST: Provides up to 22 minutes of backup runtime at a 300W load—keeping computers, TVs, DVRs, Wi-Fi routers, modems, external drives, NAS systems, and smart home devices powered during outages
- SINEWAVE POWER: Protect expensive hardware from damage with clean power that mimics utility electricity, ensuring your sensitive components run cooler and last longer. Auto Voltage Regulation boosts low/trims high voltage
- TEN PROTECTED OUTLETS: Power your entire setup with 6 battery backup outlets for essential devices, plus 4 surge-only outlets for peripherals—plus built-in coaxial and Ethernet surge protection for added peace of mind
- REAL-TIME STATUS DISPLAY: Instantly view remaining runtime, power load (watts), and system status on the easy-to-read LCD screen, angled for comfortable viewing from a seated position
Bestseller No. 6
Eaton Tripp Lite Series SMART1500LCDT 1500VA UPS Battery Backup Computer Uninterruptible Power Supply Units & Surge Protector, 900W, 10 Outlets, AVR, LCD Screen, 3 Year Warranty & $250,000 Insurance
- COMPUTER UNINTERRUPTIBLE POWER SUPPLY UNITS: 900W battery backup with 10 outlets guard your devices against power surges and black outs. Six-foot extension cord (NEMA 5-15P) connects to standard outlets. Features 650 joules of surge protection.
- RELIABLE PROTECTION: 10 outlets provide UPS battery backup & surge protection to protect servers, computers & peripherals. Perfect for computer desktop PC, gaming console, workstation, small server, network devices, wireless router and more.
- AUTOMATIC VOLTAGE REGULATION: AVR corrects brownouts & over voltages between 92V and 150V back to safe standard 120V without using battery power. Also features 100 Mbps Ethernet RJ45 port protection and Telephone/DSL RJ11 port dataline protection.
- ADVANCED POWER FEATURES: Internal batteries are easily user replaceable with Tripp Lite's RBC51 battery cartridge. LCD screen displays power information including battery runtime, wattage load, overload, AVR, input voltage, and battery statuses.
- FULLY SUPPORTED: Protected by a 3-Year Limited Manufacturer's Warranty and a $250,000 Ultimate Connected Equipment insurance. To best support your purchase, Eaton's expert technical team is available via phone, web, or email to address any concerns.
Bestseller No. 7
GOLDENMATE 1000VA/800W Lithium UPS Battery Backup & Surge Protector, Backup Battery Power Supply with LiFePO4 Batteries(230.4 Wh), Sinewave UPS System, 10 Years Lifespan, 8 Ports, LCD Display, Gray
- [Multi-Outlets & Efficient Cooling System]: Featuring eight NEMA 5-15P outlets with both surge protection and battery backup, this plug-and-play device comes with an AC power cord. It also includes a built-in Battery Management System (BMS) and PP45 terminals for safe and reliable connections.The advanced BMS works efficiently with cooling system.The newly updated cooling fan operates at a noise level below 50 dB. Note: The high-power cooling fan will activate when the BMS detects heavy battery usage
- [LiFePO4 Battery, Ultra-long Endurance]: This lithium UPS is equipped with a state-of-the-art Lithium Iron Phosphate Battery Pack, delivering a lifespan of over 10 years and more than 5000 charge cycles. Compared to traditional lead-acid battery solutions, it offers a total cost of ownership (TCO) that is more than 40% lower. The advanced battery technology not only ensures long-lasting performance but also eliminates the need for frequent battery replacements, providing a cost-effective and reliable power backup solution
- [Trustworthy Protections]: The 1000VA/800W Pure Sine Wave Battery Backup Uninterruptible Power Supply (UPS) System continuously monitors battery voltage, ensuring high efficiency and reliability. It effectively addresses common electrical issues like power outages, high/low voltage, voltage drops, damping shocks, high voltage pulses, voltage fluctuations, and surges. This system is perfect for safeguarding computers, workstations, network devices, and telecom equipment
- [Professional UPS with Certifications]: Our UPS battery backup has successfully passed rigorous safety certifications, ensuring compliance with the highest industry standards. It incorporates the leading chip technology in the industry, providing double anomaly protection for enhanced safety and reliability. Additionally, the system offers a maintenance-free operation for up to 10 years, guaranteeing peace of mind and long-term dependability
- [Intelligent LCD Panel]: This UPS provides real-time, detailed information on battery and power conditions, ensuring optimal performance and reliability. It features an automatic safety mechanism that halts charging and discharging if limits are exceeded, preventing potential damage. This not only protects the system from overloading and overheating but also significantly extends the UPS's lifespan, ensuring long-term, dependable operation
Bestseller No. 8
GOLDENMATE 1000VA/800W Lithium UPS Battery Backup and Surge Protector, Backup Battery Power Supply with LiFePO4 Batteries(230.4 Wh), Pure Sinewave UPS System, 8 Outlets, LCD Display, New Upgrade Ver
- [Long-Life Lithium Backup with Reduced Ownership Cost]: This UPS adopts an industrial-grade lithium iron phosphate energy system designed for extended operational life. With a service expectancy exceeding a decade and thousands of stable charge cycles, it dramatically lowers replacement frequency and overall lifetime cost when compared to traditional lead-acid backup units
- [Stable Pure Sine Wave Output for Sensitive Electronics]: Providing up to 1000VA / 800W of clean pure sine wave power, this UPS helps maintain consistent voltage quality during outages and grid instability. It shields connected equipment from surges, drops, spikes, brownouts, and power fluctuations—making it suitable for computing, networking, and telecom applications
- [Device-Ready Power Distribution with Smart Cooling Support]: Designed to support multiple devices at once, this system features eight protected AC outlets and pre-installed power cabling for immediate use. Internal PP45 connectors, intelligent battery management logic, and an adaptive cooling architecture ensure safe power delivery under both normal and high-load conditions, while maintaining quiet operation below 50 dB
- [Real-Time System Visibility with Automatic Protection Logic]: A built-in LCD interface allows users to monitor power status, battery capacity, and load levels at a glance. When abnormal voltage, current, or thermal conditions are detected, the system automatically limits or stops operation to prevent damage, supporting long-term reliability
- [Certified Safety Architecture with Maintenance-Free Operation]: Engineered to meet strict safety and performance standards, this UPS integrates advanced control chips and layered protection mechanisms. The lithium-based design eliminates routine battery maintenance and supports long-term, hands-off operation for up to 10 years
Bestseller No. 9
APC Back-UPS 850VA / 450W UPS Battery Backup & Surge Protector, 9 Outlets, Type A Charger, BE850G2 Uninterruptible Power Supply for Home Office & Computer
- 850VA / 450W RELIABLE BACKUP POWER: Supplies short‑term battery power during outages to maintain internet connectivity and allow safe shutdown of computer and other devices during power interruptions.
- STAY CONNECTED WHEN IT MATTERS MOST: Delivers up to 20 minutes of runtime when powering a 150W load. Mid-Size battery backup for computers, Wi‑Fi routers, modems, external drives, NAS, and Smart-Home IoT devices
- POWER & CHARGE ALL YOUR ESSENTIAL DEVICES: 9 well‑spaced outlets (6 battery backup + surge protection, 3 surge‑only), plus 2 USB‑A ports (5V/2.4A shared), provide reliable protection and fast charging for multiple devices
- INSTANT UPS STATUS & EASY BATTERY REPLACEMENT: Clear indicators and mutable audible alerts give quick UPS status updates. The battery is User‑replaceable with genuine APC replacement battery Model RBC17 (sold separately)
- ENHANCED PROTECTION FOR CONNECTED ELECTRONICS: Supported by a 3‑Year Warranty and $75,000 Equipment Protection, offering enhanced coverage for connected devices and added assurance against power‑related damage
Bestseller No. 10
Eaton Tripp Lite Series OMNI1500LCDT 1500VA UPS Battery Backup Computer Uninterruptible Power Supply Units & Surge Protector, 810W, 10 Outlets, AVR, LCD Screen, 3 Year Warranty & $250,000 Insurance
- COMPUTER UNINTERRUPTIBLE POWER SUPPLY UNITS: 810W battery backup with 10 outlets guard your devices against power surges and black outs. Six-foot extension cord (NEMA 5-15P) connects to standard outlets. Features 650 joules of surge protection.
- RELIABLE PROTECTION: 10 outlets provide UPS battery backup & surge protection to protect servers, computers & peripherals. Perfect for computer desktop PC, gaming console, workstation, small server, network devices, wireless router and more.
- AUTOMATIC VOLTAGE REGULATION: AVR corrects brownouts & over voltages between 92V and 150V back to safe standard 120V without using battery power. Also features 100 Mbps Ethernet RJ45 port protection and Telephone/DSL RJ11 port dataline protection.
- ADVANCED POWER FEATURES: Internal batteries are easily user replaceable with Tripp Lite's RBC51 battery cartridge. LCD screen displays power information including battery runtime, wattage load, overload, AVR, input voltage, and battery statuses.
- FULLY SUPPORTED: Protected by a 3-Year Limited Manufacturer's Warranty and a $250,000 Ultimate Connected Equipment insurance. To best support your purchase, Eaton's expert technical team is available via phone, web, or email to address any concerns.
Best Computer Uninterruptible Power Supply Units Buying Guide
Before choosing the best uninterruptible power supply you should consider following options:
1. Battery types: There are two main kinds of batteries used in UPS systems – lead acid and lithium.
Lithium batteries have a higher energy density, so they can provide longer runtimes. They are also lighter, so a lithium-based UPS is easier to move around.
However, lithium batteries are more expensive, and they don’t last as long as lead-based ones.
Also, lithium batteries need to be replaced every three to five years, whereas lead-based systems can last for up to 10 years.
2. Battery capacity: The battery capacity of a UPS is measured in volts/ampere hours (VAh). The higher the VAh rating, the longer the runtime.
3. On-battery runtime: This tells you how long the UPS can continue supplying power on its own batteries before the generator kicks in.
The longer the runtime, the more time you have to switch off your computer and switch on the backup system.
You can also reduce downtime by keeping your computer running on battery, while simultaneously switching on the backup system to supply power.
4. UPS rating: This tells you how much power the UPS can supply. Most UPSes have a rating between 750VA and 10,000VA. The higher the rating, the more computers the UPS can supply with power.
5. Line-interruption rate (LIR): This tells you how frequently the UPS can be interrupted before the battery is fully drained. The lower the LIR, the better.
6. Response time: This tells you the time taken for the UPS to switch from on-battery to on-grid and vice versa. The shorter the response time, the better.
7. Number of outlets: This tells you how many devices the UPS can supply with power at a single point in time. The higher the number, the better.
8. Warranty: This tells you the period for which the UPS manufacturer guarantees free replacement of the unit in case of defects.
What else you should know about computer uninterruptible power supply units
1. What is a UPS?
A UPS is a device that provides emergency power to a load when the input power source fails. A UPS differs from a generator in that it will provide near-instantaneous power by supplying energy stored in batteries, flywheels, or supercapacitors.
2. What are the benefits of using a UPS?
Some benefits of using a UPS include:
-providing backup power in case of a power outage
-protecting against power surges
-allowing you to keep working during a power outage
-preventing data loss in the event of a power outage
3. How does a UPS work?
A UPS is an uninterruptible power supply. It is a device that provides emergency power to a load when the input power source fails. A UPS differs from a standby generator in that it will provide near-instantaneous power to the load when the input power fails.
4. What are the different types of UPS systems?
The different types of UPS systems are standby, line-interactive, and online.
5. How do I choose the right UPS for my needs?
There is no definitive answer to this question as it depends on the specific needs of your business. However, some factors you may want to consider include the size of your business, the type of equipment you are using, your power requirements, and your budget.
Conclusion
On the market, there are numerous best computer uninterruptible power supply units. Hopefully, the list of the top ten best computer uninterruptible power supply units will save you time researching and deciding on the best one for you.