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Overview

Keep your essential electronics safe and running during power interruptions with the CyberPower ST425 Standby UPS System. Designed for home offices, computers, routers, and gaming consoles, this compact yet powerful UPS provides reliable battery backup and surge protection to prevent data loss and equipment damage.

CyberPower ST425 Standby UPS System – 425VA/260W Battery Backup & Surge Protector with 8 Outlets, Compact Uninterruptible Power Supply for Home & Office Electronics

Model: ST425
Web Code: 19596732
Sold and shipped by | 3.2 seller rating (36 reviews)

Available for deliveryAvailable online only

Delivery times vary by location. Most Marketplace items leave sellers' locations within 2 business days. Allow additional time for shipping.

Seller Return Policy

Warranty

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

The CyberPower ST425 Standby UPS System delivers dependable power protection in a sleek, space-saving design. Featuring 425VA/260W of output power, it safeguards your devices against sudden power outages, voltage fluctuations, and electrical surges. Perfect for desktop computers, modems, routers, home entertainment systems, and office electronics, this UPS ensures uninterrupted operation and peace of mind.

Reliable Battery Backup & Surge Protection

The ST425 provides instant battery backup during blackouts, keeping your essential devices powered long enough to safely shut down or continue working. Its built-in surge protection prevents damage caused by lightning strikes or power spikes.

8 Convenient Outlets

Equipped with 8 total outlets—4 with battery backup and surge protection, and 4 with surge-only protection—you can easily connect multiple devices for complete coverage.

Compact & Space-Saving Design

Engineered for convenience, the slim, lightweight design fits neatly on or under your desk, making it ideal for small office or home setups without taking up extra space.

Automatic Voltage Regulation (AVR)

The system automatically corrects minor voltage fluctuations without switching to battery mode, helping extend battery life and maintain consistent performance.

Energy Efficient & Silent Operation

With Energy-Saving GreenPower UPS™ Technology, the ST425 minimizes power consumption while providing quiet, reliable performance—perfect for home or office environments.

LED Status Indicators

Easy-to-read LED lights clearly display power status, battery condition, and fault alerts, ensuring you always know your system is protected.

Key Features:

425VA / 260W standby UPS for small electronics

8 total outlets (4 battery + 4 surge-only)

Compact and lightweight design for easy placement

Surge and spike protection for sensitive devices

GreenPower UPS™ technology for energy efficiency

Ideal for computers, modems, routers, gaming consoles, and more

The CyberPower ST425 offers reliable protection in a compact form—keeping your critical devices powered and secure, even when the lights go out.

CyberPower UPS, standby UPS system, battery backup surge protector, uninterruptible power supply, compact UPS, home office UPS, 425VA UPS, power outage protection, computer UPS backup, surge protection system.

Product Condition
Brand New

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

Shipping Charges

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Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

Shipping Area Restrictions

Shipping is not available in the following areas*:
  • No restrictions in Canada
*Please note: Shipping area restrictions may vary for large items. If an item can't be shipped to your address, we'll let you know during the checkout process.
Product Category
Computer accessories
Return/Exchange Period
30 days
Condition
Opened

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