What is the difference between a UPS and a portable power station?

A UPS (uninterruptible power supply) sits between the wall outlet and your device and switches to battery power instantly when the power drops, with no gap. A portable power station is a large battery you plug things into manually. The UPS protects equipment from the split-second interruption that corrupts files and crashes computers. A power station gives you hours of portable power but does not protect against that instant-loss moment. For preparedness, a UPS protects your router and computer. A portable power station runs your phone, lights, and small appliances during an extended outage. They serve different purposes and most prepared households benefit from both.

Do I need pure sine wave or is simulated sine wave fine?

If your UPS will power a computer built in the last ten years, you want pure sine wave. Modern computer power supplies use a technology called Active Power Factor Correction (Active PFC) that expects clean sine wave power. A simulated sine wave UPS delivers a stepped approximation that can cause Active PFC power supplies to shut down, restart, or overheat. For a router and modem that use small external power adapters, simulated sine wave works fine and costs less. For a computer, gaming console, or NAS, choose pure sine wave.

How long will a UPS keep my equipment running?

Runtime depends on the UPS capacity and the load connected to it. A 1500VA UPS running a router and modem (about 30 watts) can last 45 to 90 minutes. The same UPS running a desktop computer and monitor (about 300 watts) lasts 5 to 10 minutes. A UPS is not designed to power equipment for hours during an outage. Its job is to keep your internet alive long enough to receive emergency alerts and give you time to save work and shut down your computer properly. For extended runtime, pair a UPS with a portable power station.

What size UPS do I need?

Add up the wattage of everything you plan to plug into the battery-backed outlets. A typical router and modem draw 15 to 30 watts combined. A desktop computer with one monitor draws 150 to 400 watts depending on the system. Choose a UPS rated for at least 30% more than your total load. For a router and modem only, a 600VA to 850VA UPS is sufficient. For a computer and monitor, choose 1000VA to 1500VA. Never plug laser printers, space heaters, or other high-draw devices into a UPS.

How often do UPS batteries need to be replaced?

UPS batteries are sealed lead-acid cells that typically last three to five years. The UPS will alert you when the battery needs replacement, usually through a flashing LED or an on-screen warning. Replacement batteries for both APC and CyberPower units are widely available on Amazon and cost between $25 and $60 depending on the model. Both brands design their consumer units for user-replaceable batteries with no tools required. Heat shortens battery life, so avoid placing a UPS in direct sunlight or next to a heat source.

Home Gear Reviews Best UPS Battery Backup

Gear Review

Best UPS Battery Backup for Emergency Preparedness

A UPS does two things for a prepared household: it keeps your router alive so you can receive emergency alerts during an outage, and it gives you time to shut down a computer without losing work. Four units compared for the jobs that actually matter.

Updated September 2026

Quick Verdict

Our picks at a glance

Our Pick

CyberPower CP1500PFCLCD

Pure sine wave, 1500VA/1000W, 12 outlets, color LCD, AVR, USB-A and USB-C ports. The consensus best UPS for home offices and preparedness. Three-year warranty including batteries.

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Best Premium

APC BR1500MS2 Back-UPS Pro

Pure sine wave, 1500VA/900W, 10 outlets, LCD, USB-C charging port. The APC name with genuine sine wave output. User-replaceable battery.

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Best for Router

CyberPower CP850PFCLCD

Pure sine wave, 850VA/510W, 10 outlets. Right-sized and right-priced for networking gear. Keeps your internet alive for over an hour during a typical outage.

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Best Budget

APC BE600M1

600VA/330W, 7 outlets, USB charging port. Simulated sine wave (fine for routers, not for computers). Under $70. The simplest entry point.

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Side by Side

How they compare

Feature	CP1500PFCLCD	BR1500MS2	CP850PFCLCD	BE600M1
Capacity	1500VA / 1000W	1500VA / 900W	850VA / 510W	600VA / 330W
Waveform	Pure sine wave	Pure sine wave	Pure sine wave	Simulated sine wave
Outlets (total)	12 (6+6)	10 (6+4)	10 (5+5)	7 (5+2)
Battery-backed outlets	6	6	5	5
Display	Color LCD	LCD	Color LCD	LED indicators
AVR	Yes	Yes	Yes	No
USB charging	USB-A + USB-C	USB-A + USB-C	USB-A + USB-C	USB-A
Warranty	3 years (incl. battery)	3 years	3 years (incl. battery)	3 years
Safe for computers	Yes	Yes	Yes	Router/modem only
Approx. street price	$220–$260	$220–$300	$130–$160	$55–$70

Our Pick

CyberPower CP1500PFCLCD

The consensus best UPS for home use

The CP1500PFCLCD has been the default recommendation from independent reviewers, IT professionals, and the home-lab community for years, and the reason is straightforward: it delivers pure sine wave output at a price point that undercuts every comparable APC model by 15 to 20 percent. At 1500VA/1000W, it has enough capacity for a desktop computer, one or two monitors, and a router.

Pure sine wave output matters because every modern computer power supply uses Active Power Factor Correction, which expects clean sine wave input. A simulated sine wave UPS feeds these power supplies a stepped approximation that can cause them to shut down, restart, or run hot. The CP1500PFCLCD outputs clean power that matches what comes from the wall.

The color LCD displays real-time information: input voltage, output voltage, load percentage, battery capacity, and estimated runtime. This is useful during brownouts: if you see the input voltage dropping while the UPS compensates with AVR (Automatic Voltage Regulation), you know the grid is stressed before the power actually fails. AVR also extends battery life by correcting minor voltage fluctuations without switching to battery mode.

Twelve outlets total: six battery-backed with surge protection, six with surge protection only. USB-A and USB-C charging ports work even during a power failure, so you can charge a phone from the UPS battery. CyberPower's PowerPanel software (free download) enables automatic graceful shutdown via USB connection to your computer. The three-year warranty covers the battery, which most UPS warranties exclude.

CyberPower's $500,000 Connected Equipment Guarantee covers properly connected devices damaged by a surge, which is a meaningful commitment from a company that has been making UPS units since 1997.

Who this is for: Any household with a desktop computer that needs protection from power outages and surges. Also the right choice if you want a single UPS that handles both computer protection and router backup, though a dedicated smaller unit for the router gives you longer runtime at lower cost.

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Best Premium

APC BR1500MS2 Back-UPS Pro

The APC name with genuine pure sine wave

APC (a Schneider Electric brand) has the longest track record in consumer UPS units and the widest service network. The BR1500MS2 is their current pure sine wave offering at the 1500VA tier, delivering 900W of clean power through six battery-backed outlets and four surge-only outlets.

The important distinction: APC sells several 1500VA models, and not all of them are pure sine wave. The BX1500M, which costs less and appears higher in search results, uses simulated sine wave. The BR1500MS2 specifically is the pure sine wave version. If you are buying APC, confirm you have the BR1500MS2 or BR1000MS (1000VA version) and not the BX-series.

At 900W, the APC delivers 100W less than the CyberPower's 1000W at a similar or higher price. The practical difference is small for most households: 900W still comfortably handles a desktop computer and monitor. The APC advantage is brand familiarity, wider retail availability, a USB-C charging port, and the Energy Star certification that the CyberPower also carries. Replacement batteries are widely available (model APCRBC163) and user-installable with no tools.

Who this is for: Households that prefer the APC brand or already own APC equipment and want to stay in the same ecosystem. The BR1500MS2 is a genuinely good UPS. It costs slightly more for slightly less wattage than the CyberPower, which is why it earns "Best Premium" rather than "Our Pick."

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Best for Router

CyberPower CP850PFCLCD

Right-sized for the most important preparedness job

For preparedness, the single most valuable thing a UPS can do is keep your internet connection alive during a power outage so you can receive emergency alerts, check weather radar, and communicate. A router and modem together draw about 15 to 30 watts. A 1500VA UPS running that load is dramatically oversized. The CP850PFCLCD at 850VA/510W is right-sized for networking gear and delivers significantly longer runtime per dollar.

At a 30-watt load, this UPS can keep a router and modem running for well over an hour, which covers the vast majority of residential power outages. It still outputs pure sine wave through AVR, so it provides the same quality of power as its larger sibling. The color LCD shows the same real-time data. Five battery-backed outlets and five surge-only outlets give you room to add a small switch or access point.

The practical setup: put this UPS under your desk or in the closet where your router lives. Plug the router, modem, and one network switch into the battery-backed outlets. Plug everything else (printer, desk lamp, phone charger) into the surge-only outlets. During an outage, your internet stays up while the non-essential devices go dark.

Who this is for: Every prepared household should consider a dedicated UPS for networking gear, separate from any computer UPS. This is the one to buy for that job. It is also sufficient for a laptop workstation (laptops have their own battery, so the UPS just needs to keep the charger and router powered).

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Best Budget

APC BE600M1

The lowest-cost entry into battery backup

At under $70, the APC BE600M1 is the simplest way to add battery backup to a router and modem. It is the best-selling UPS on Amazon by volume, with tens of thousands of reviews, and for a single purpose it works well: plug in your networking gear, and it keeps running when the power goes out.

The trade-offs are real. It uses simulated sine wave, not pure, which means you should not plug a desktop computer into it. No AVR, so it cannot correct brownouts without switching to battery. No LCD display, just LED indicators. Seven outlets total, five battery-backed and two surge-only. A single USB-A port for phone charging.

For the specific job of keeping a router and modem alive during brief outages, simulated sine wave is not a problem. Routers and modems use external power adapters that are tolerant of stepped waveforms. The 600VA/330W capacity is more than enough for networking gear, and the 30-watt load gives you reasonable runtime.

Who this is for: Households that want to keep internet connectivity during power outages and are not protecting a computer. If your preparedness budget is limited, this covers the most important job at the lowest cost. Upgrade to the CP850PFCLCD when the budget allows, for pure sine wave and AVR.

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How We Chose

Two jobs, not one

Most UPS guides evaluate units as computer accessories. For preparedness, the value proposition is different. A UPS does two specific things during a power outage:

Job 1: Keep the internet alive. When the power goes out, your router and modem die. Without internet, you cannot receive emergency alerts, check weather radar, access information about what is happening, or communicate by email and messaging apps. A UPS on your router extends your connectivity window from zero to an hour or more. This is the highest-value use of a UPS for preparedness, and it requires the smallest, least expensive unit.

Job 2: Protect a computer from data loss. A sudden power loss while a computer is running can corrupt open files, damage the operating system, and in rare cases harm the storage drive. A UPS gives you five to ten minutes to save work and shut down properly. If you work from home, this protects your livelihood. If you do not use a desktop computer, this job does not apply to you.

We evaluated UPS units on:

Waveform quality: Pure sine wave for computers, simulated acceptable only for routers.
Capacity vs. load: Matched to realistic household loads with 30% headroom.
AVR (Automatic Voltage Regulation): Corrects brownouts without draining the battery. Present on all three higher-tier units.
Brand track record: APC (Schneider Electric) and CyberPower are the two dominant brands with decades of UPS manufacturing. Both offer user-replaceable batteries, readily available replacements, and meaningful warranties.
Runtime at realistic loads: Calculated at the loads preparedness households actually draw, not peak capacity.

We did not evaluate enterprise or rackmount UPS units, lithium UPS models (promising but newer and more expensive), or UPS units from brands without established U.S. warranty support.

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What setup does your household need?

Router and modem only (most households)

The CP850PFCLCD is the sweet spot: pure sine wave, AVR, color LCD, and enough capacity to run networking gear for well over an hour. Cost: around $130 to $160. If that stretches the budget, the APC BE600M1 at under $70 covers the same job with fewer features. Either one keeps your internet alive during the most common outage scenarios.

Desktop computer and router

The CP1500PFCLCD handles both jobs in one unit. Plug the computer and monitor into battery-backed outlets, the router into another battery-backed outlet, and peripherals into surge-only outlets. For longer router runtime, consider a dedicated CP850PFCLCD on the router and the CP1500PFCLCD on the computer. Two units cost more but give each job the right amount of battery.

Laptop only

A laptop has its own battery, so a sudden power loss does not cause data loss. You still want a UPS on your router for internet continuity. The CP850PFCLCD or BE600M1 is all you need. Plug the laptop charger into a battery-backed outlet so the laptop stays topped off during outages, and your internet stays connected.

Pairing with a portable power station

A UPS and a portable power station serve different purposes and work well together. The UPS provides instant, seamless switchover for the router and computer. The power station provides hours of power for phones, lights, a fan, and other essentials. During an extended outage, you can plug the UPS into the power station's AC outlet to extend the UPS battery life, though you should test this combination before you need it.

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