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Best OverallA sine wave battery backup for computers with active PFC power supplies, with AVR smoothing small sags without touching the battery. The listing omits capacity, outlets and runtime, so confirm those first.
Popular PickA sensible backup for a desktop and network gear that needs time to save work and shut down. Output on battery is a simulated sine wave, so check what your equipment expects.
A strong home office and gaming UPS with clean sine wave output, voltage regulation and a generous outlet count, safe for Active PFC power supplies. It is heavy and runs only minutes at full load.
A compact battery backup for owners of a supported UGREEN NAS who want the drives to ride through short outages. It is listed for the NAS only, with no wall outlets shown, and runtime is not published.
A slim battery backup for routers, consoles and desktop PCs that rides out short outages and allows a safe shutdown. Runtime is short and output is a simulated sine wave, so it is for brief backup, not long power cuts.
A neat way to keep a Pi Zero project running through power cuts or away from an outlet. The power button and auto start share a bus pin, so they cannot run alongside sensor bus devices.
A gaming UPS with room for a full desk of gear and USB-C charging that works on battery, for anyone who loses saves to brownouts. Runtime figures and output waveform are not listed, which matters for some PC power supplies.
A tiny UPS battery board that holds a Raspberry Pi Zero running through power cuts and boots it when power returns. It fits only the Zero W and WH, and the board itself is not included.
A capable tower backup for a home office desk that needs voltage correction and a few minutes to save work. Runtime figures are short and stated without a load, so plan for shutdown, not for working through outages.
A shallow rackmount UPS for small business network and point of sale gear that needs protection from brief outages. Listed runtime is very short, so it bridges blips, not long blackouts.
A battery backup board that runs a Raspberry Pi through power cuts and shuts it down safely. Batteries, case and power adapter are all sold separately.
A simple backup battery for a Pi Zero that boots itself when power returns, but it lacks a clock for scheduled starts and the custom button clashes with bus sensors.
A slim, mountable battery backup for signage, POS and edge gear, with surge protection on every outlet and tolerance for warm spaces. Its small capacity suits light loads, not a full desktop workstation.
A slim rackmount battery backup with clean sinewave output for small network racks and point-of-sale gear. Capacity is modest, so it covers switches and routers rather than full servers.
A rackmount pure sine wave UPS with a built in network card for server rooms that need remote monitoring and clean shutdowns. It is built for IT racks, not a desk, and its listed runtime gives no load.
A tidy way to keep a Pi-hole or Pwnagotchi build running through short outages or on the move. Boards outside the named models are not covered, and the runtime figure comes with no stated load.
A rackmount pure sine wave UPS for small server racks, network gear and POS systems, with cloud monitoring through its Ethernet port. It has no SmartSlot for a network card, and its watt capacity is modest for larger servers.
A rack mount, pure sine wave UPS with remote SmartConnect monitoring for servers and network gear. It needs a high amperage twist lock outlet and is very heavy.
A rackmount pure sine wave UPS with a SmartSlot for network card shutdown of servers and virtual machines. It is heavy to lift into a rack, and the card is extra.
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CyberPower CP1500PFCLCD Sinewave UPS Battery BackupModel CP1500PFCLCDACyberPower CP1500AVRLCD3 UPS Battery BackupModel CP1500AVRLCD3APC Back-UPS Pro BR1500MS2 Pure Sine Wave UPSModel BR1500MS2These 3 uninterruptible power supply (ups) have the highest ProductDome scores among the established products in this category, meaning ones with a large volume of owner ratings and strong evidence; on a tie, the product with more rating evidence ranks first. The score combines owner satisfaction, rating volume, demand and data quality from public Amazon listings (updated 3 days ago). We do not test products ourselves.
APC, CyberPower, PISUGAR, Benuomi, PiSugar lead this category among the 8 brands that passed our curation checks.
A listing appears only when it has a recorded price, a minimum customer rating, and enough ratings or monthly sales. Generic and unbranded listings are left out, while every real brand stays, including brands sold only on Amazon. The ones that pass are ordered by the ProductDome score, which weighs owner satisfaction, rating volume, demand and data quality.
Uninterruptible power supplies keep a computer, router or other equipment running for a short time when the power fails, and they protect against surges and brownouts. Standby models switch to battery when the power drops, line interactive models also correct voltage dips without using the battery, and online double conversion models power the load continuously from the inverter. The first decision is what you protect, because a home router needs a small unit, while a desktop computer with a monitor, a network storage device or a server needs more capacity.
Capacity and runtime are the next questions. Add up the wattage of everything you will plug into the battery outlets and choose a unit rated above that total with a margin. Among the 20 products that list output wattage, most fall between 210 and 2,700 watts, and 900 watts is typical. Runtime falls quickly as the load rises; most units are designed to give enough time to save work and shut down, not to run for hours. Extended battery packs are available on some models for longer runtime.
Waveform and features matter for some equipment. Computers with active power factor correction power supplies often prefer a pure sine wave output, which costs more than simulated sine wave units. A display showing load and runtime, a data port for automatic shutdown software, and user replaceable batteries are useful. Rack mount and tower units suit server rooms and offices.
Before buying, check the volt amp and watt ratings, the number of battery backed and surge only outlets, the output waveform, the plug type, whether shutdown software and a cable are included, and the battery replacement part. Plan to replace the battery every few years, test the unit regularly, and never plug a laser printer or space heater into the battery outlets.
How we list products: every listing here has a recorded price, a minimum customer rating and enough ratings or monthly sales. Generic and unbranded listings are left out; every real brand stays, including brands sold only on Amazon. Products are ordered by the same ProductDome score on every page.Editorial policy