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Ranked & Reviewed by Primea Reviews

The 6 Best UPS Battery Backups With Replaceable Batteries, Ranked & Reviewed

By the Primea Editorial TeamUpdated November 3, 202610 min read6 products ranked

The short answer

The APC BR1500MS2 is the best replaceable-battery UPS here, with a pure sine wave output, 1500VA/900W capacity and a standard APCRBC163 battery. The APC BX1500M offers the same capacity with AVR for less, and the BX1000M and BX850M serve single-PC setups. The BE650G1 and BE600M1 are the budget picks for small loads.

The Primea Scoreboard

Ranked & Reviewed

01
Best Overall
APC UPS 1500VA/900W Pure Sine Wave UPS for Computer, Electronics, BR1500MS2
Pure sine wave output, 900W capacity and a standard APCRBC163 battery you can swap yourself.
Outstanding
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02
Best Value at 1500VA
APC UPS 1500VA/900W Battery Backup for PCs, Office Electronics, BX1500M
The same 1500VA/900W capacity with AVR and a standard replaceable cartridge, for less.
Outstanding
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03
Best for a Single PC
APC 1000VA/600W Pro UPS Battery Backup for Office Electronics, AVR, BX1000M
A 1000VA/600W unit with AVR for one PC and a monitor, with a standard battery.
Excellent
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04
Best Compact Pro
APC 850VA/510W Pro UPS Battery Backup for Office Electronics, AVR, BX850M
A compact 850VA/510W unit with AVR and a standard replaceable battery.
Excellent
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05
Best Budget With Surge Protection
APC UPS 650VA/390W Battery Backup & Surge Protector for PC, NAS | BE650G1
A 650VA/390W unit with surge protection and a standard replaceable battery.
Excellent
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06
Best Entry Level
APC UPS 600VA/330W UPS Battery Backup for Computer, Router, NAS, BE600M1
The most affordable pick, 600VA/330W for a computer, router or NAS.
Very Good
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A UPS is sold on its first day and judged on its fourth year. The lead-acid battery inside wears out in roughly three to five years, and what happens next separates a good buy from a throwaway. A model with a standard, user-replaceable battery cartridge lets you slide in a new one in minutes and keep the electronics around it for another cycle. A sealed unit has to be junked or taken apart. Over a decade, the replaceable design costs a fraction of what repeated whole-unit purchases do.

So we ranked six UPS models, all from APC, by what they protect and what ownership costs. We reviewed the listings for VA and watt ratings, waveform, AVR, battery type and warranty. The replacement cartridge model is named on only one listing, so we do not quote part numbers for the others, and you should confirm the right one in the manual before buying a battery.

Before you buy

What Actually Matters

Replaceable battery

A lead-acid UPS battery lasts about three to five years, and a user-replaceable cartridge lets you swap it without tools or a technician. The cost of a new cartridge is far less than a new UPS. Look for a named battery model, such as APCRBC163, and check availability.

VA versus watts

VA is apparent power and watts is real power, and the watt rating is the limit that counts. Add the wattage of everything you plug in and keep the total under about 70 percent of the UPS rating. Read the watt figure on the listing, not just the VA.

Pure sine versus simulated

Pure sine wave output is smooth, and simulated sine is a stepped approximation. Active PFC power supplies in some modern PCs can misbehave on the stepped version. Look for the words pure sine wave if your computer uses PFC.

AVR

Automatic voltage regulation corrects high and low line voltage without switching to battery. That keeps the battery fresher in areas with dips and surges. Check the spec list for AVR, since the cheapest units often leave it out.

Runtime expectations

Runtime depends on load, and a bigger load drains the battery faster. A UPS is meant to give a few minutes for a clean shutdown, not hours of operation. None of these listings state a runtime, so plan around shutdown time.

In-depth reviews

Our Ranked Picks, Reviewed

Best Overall

APC UPS 1500VA/900W Pure Sine Wave UPS for Computer, Electronics, BR1500MS2

Outstanding

Check price on Amazon

Our verdict: Pure sine wave output, 900W capacity and a standard APCRBC163 battery you can swap yourself.

The BR1500MS2 provides 1500VA and 900W with a pure sine wave output. Its battery is a user-replaceable APCRBC163, a widely stocked standard part, and the unit carries a three-year warranty. Budget $200 to $500.

It wins by covering the two failures that matter in a UPS. A pure sine wave output is safe for every power supply, including active PFC types that can shut down on the stepped waveform of cheaper units. And a named, common battery means a replacement is easy to find and costs less than a new UPS. The 900W capacity handles a desktop PC with a monitor and some peripherals. It costs more than the BX line, which uses a simulated sine wave.

Buy it for a gaming or workstation PC with an active PFC supply, or any setup you plan to keep for years. Confirm the battery part number in the manual when you reorder.

Capacity: 1500VA / 900W
Waveform: Pure sine wave
Battery: APCRBC163, user-replaceable
Warranty: 3 years

What we like

+Pure sine wave suits every PSU
+Named, widely stocked battery part
+900W covers a full desktop setup
+Three-year warranty

Watch out for

−Priciest of the six
−Heavy and bulky for its size

Buy it if: Buyers who want a widely available, genuinely cost-saving replacement battery part.

Skip it if: You only need a basic backup for a router.

Best Value at 1500VA

APC UPS 1500VA/900W Battery Backup for PCs, Office Electronics, BX1500M

Outstanding

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Our verdict: The same 1500VA/900W capacity with AVR and a standard replaceable cartridge, for less.

The BX1500M offers 1500VA and 900W, a standard replaceable battery cartridge and AVR. It is in the $100 to $200 range, and the listing calls the replacement part widely available.

It ranks second because it matches the BR1500MS2 on capacity and the replaceable battery for a lower price. The saving comes from the output waveform, which on this class of APC is a stepped approximation of a sine wave, so a rare active PFC power supply may complain. For most PCs and office electronics it behaves well. AVR corrects low and high mains voltage without using the battery, which preserves battery life.

Choose it for a home office PC, monitor and peripherals when you do not need pure sine. If your PSU documentation demands it, pay for the BR1500MS2.

Capacity: 1500VA / 900W
Battery: Standard replaceable cartridge
Regulation: AVR included
Price bracket: $100 to $200

What we like

+Same capacity as the pure sine model
+AVR saves battery wear
+Replaceable battery cartridge
+Lower price band

Watch out for

−Not a pure sine wave output
−Battery part number not listed

Buy it if: Buyers who want the most-proven replaceable-battery pick at a lower price point.

Skip it if: Your PSU requires a pure sine wave.

Best for a Single PC

APC 1000VA/600W Pro UPS Battery Backup for Office Electronics, AVR, BX1000M

Excellent

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Our verdict: A 1000VA/600W unit with AVR for one PC and a monitor, with a standard battery.

The BX1000M is rated 1000VA and 600W, has AVR and a standard replaceable battery, and is described as office electronics rated. It costs $100 to $200.

Third place fits because 600W is the right size for a single mid-range PC and a monitor, and the battery cost stays predictable for the life of the unit. It is not far below the BX1500M in price, so the extra headroom of the bigger unit is often cheaper per watt. The listing says little about connected equipment limits, so add up your devices' wattage.

Buy it for one desktop with a modest graphics card. A gaming PC with a high-end GPU needs the 1500VA models.

Capacity: 1000VA / 600W
Battery: Standard replaceable
Regulation: AVR included
Rated for: Office electronics

What we like

+600W suits a single office PC
+AVR included
+Standard replaceable battery
+Predictable long-term cost

Watch out for

−Close in price to the 1500VA model
−Too small for a high-end gaming PC

Buy it if: Buyers with a single PC who want predictable long-term replacement battery cost.

Skip it if: You run a power-hungry gaming rig.

Best Compact Pro

APC 850VA/510W Pro UPS Battery Backup for Office Electronics, AVR, BX850M

Excellent

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Our verdict: A compact 850VA/510W unit with AVR and a standard replaceable battery.

The BX850M is rated 850VA and 510W, with AVR, a standard replaceable battery and a compact form factor. It sits at $100 to $200.

Fourth place suits it because it is the smallest of the Pro line, with the same AVR and battery approach as the larger ones. Compact matters on a crowded desk or under a shelf. The price is close to the 1000VA model, so it makes sense mainly when space, not wattage, is the limit. At 510W it handles a basic PC and a monitor, but little more.

Choose it for a modest single-device setup in tight space. Otherwise, the BX1000M offers more for similar money.

Capacity: 850VA / 510W
Battery: Standard replaceable
Regulation: AVR included
Form: Compact

What we like

+Compact for crowded desks
+AVR included
+Standard replaceable battery
+Handles a basic PC and monitor

Watch out for

−Priced close to the 1000VA unit
−510W limits future upgrades

Buy it if: Buyers with a modest single-device setup who still want a standard replaceable battery.

Skip it if: You may add a larger monitor or GPU soon.

Best Budget With Surge Protection

APC UPS 650VA/390W Battery Backup & Surge Protector for PC, NAS | BE650G1

Excellent

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Our verdict: A 650VA/390W unit with surge protection and a standard replaceable battery.

The BE650G1 is rated 650VA and 390W, adds surge protection for a PC or NAS and uses a standard replaceable battery. It is priced at $100 to $200.

It places fifth because the lack of AVR and the lower wattage make it a basic backup, though the replaceable battery keeps its cost of ownership low. It is the sensible choice for a light load: a laptop dock, a small desktop or a NAS. The listing calls it budget friendly, and in this group that is accurate.

Buy it for a small, low-draw device that needs a few minutes of runtime to shut down cleanly. Do not use it with a large monitor and a discrete graphics card.

Capacity: 650VA / 390W
Battery: Standard replaceable
Protection: Surge protection
Use: PC and NAS

What we like

+Replaceable battery
+Surge protection included
+Suits PC or NAS
+Budget friendly

Watch out for

−AVR is not listed
−Limited to light loads

Buy it if: Budget-conscious buyers who still want a standard, easily replaceable battery.

Skip it if: You need to power a high-wattage PC.

Best Entry Level

APC UPS 600VA/330W UPS Battery Backup for Computer, Router, NAS, BE600M1

Very Good

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Our verdict: The most affordable pick, 600VA/330W for a computer, router or NAS.

The BE600M1 provides 600VA and 330W, with a standard replaceable battery and backup for a computer, router or NAS. The listing calls it the most affordable pick in this group, at $50 to $100.

It ranks last because the capacity is the lowest, but its price and its replaceable battery make it a fine entry model. A router, modem and a small desktop will fit within 330W, and the battery buys the minutes you need to save work. The compact size and low cost suit a spare room or a home network closet.

Buy it for one light device where the cost matters most. If the load might grow, step up one size.

Capacity: 600VA / 330W
Battery: Standard replaceable
Rated for: Computer, router, NAS
Price bracket: $50 to $100

What we like

+Lowest price in the ranking
+Replaceable battery
+Covers a router and small PC
+Compact

Watch out for

−Only 330W of capacity
−Little room to grow

Buy it if: Budget-conscious buyers protecting a single computer, router, or NAS device.

Skip it if: You have a power-hungry desktop.

Methodology

How We Ranked These

Battery replaceability

We ranked units by how easily the battery can be swapped and whether a standard part is named, since replacement decides lifetime cost.

Capacity and headroom

We compared VA and watt ratings with typical PC and network loads, favoring models with margin.

Output waveform

We separated pure sine wave from simulated sine outputs, because active PFC power supplies can be sensitive.

Voltage regulation

We checked for AVR, which smooths brownouts without drawing on the battery and extends its life.

Warranty and price

We counted stated warranty terms and weighed each price bracket against capacity and features.

Every Primea Score uses the same weights: Performance 30% · Build & Materials 20% · Everyday Usability 20% · Value 20% · Owner Satisfaction 10%. Full scoring rules

Buyer's guide

How to Pick the Right One for You

By Connected Load

Add up the wattage of everything you will plug into the battery outlets and leave a margin.

Your load	Our pick
Router and modem, under 250W	APC UPS 600VA/330W BE600M1
Small PC or NAS, under 300W	APC UPS 650VA/390W BE650G1
PC and monitor, up to 450W	APC 850VA/510W Pro BX850M
High-end PC, up to 800W	APC UPS 1500VA/900W Pure Sine Wave BR1500MS2

By Budget

Spend	Our pick
$50 to $100	APC UPS 600VA/330W BE600M1
$100 to $200, small	APC 850VA/510W Pro BX850M
$100 to $200, large	APC UPS 1500VA/900W BX1500M
$200 to $500	APC UPS 1500VA/900W Pure Sine Wave BR1500MS2

Pure Sine Wave vs Simulated Sine Wave

Pure sine wave

A smooth output that every power supply accepts, including active PFC types. Costs more. Pick: BR1500MS2.

Simulated sine wave

A stepped output that works with most devices and costs less. A few PFC supplies may shut off on battery. Picks: BX1500M, BX1000M, BX850M, BE650G1 and BE600M1.

Choose pure sine for a gaming or workstation PC with an APFC supply, and simulated sine for everything else.

By Voltage Regulation

Power quality at home	Our pick
Frequent brownouts	APC UPS 1500VA/900W Pure Sine Wave BR1500MS2
Occasional dips	APC UPS 1500VA/900W BX1500M
Stable power, single PC	APC 1000VA/600W Pro BX1000M
Stable power, light load	APC UPS 650VA/390W BE650G1

For a Home Office PC Specifically

Look for

Enough watts for the PC and monitor, AVR, a replaceable battery and USB for automatic shutdown. A pure sine wave if the PSU needs it.

In this ranking

The APC BX1000M fits a standard office PC, and the BX1500M gives headroom for a larger monitor and a graphics card.

When to Spend More

Spend more if

Your PC has an active PFC supply or you want a three-year warranty and a named battery. The BR1500MS2 earns it.

Save if

You only protect a router or a small device. The BE600M1 or BE650G1 does it for $50 to $200.

Questions

Frequently Asked Questions

How do I replace the battery?+

Power down and unplug the UPS, open the battery door, disconnect the old battery connector and swap in the new cartridge. Recycle the old battery at a collection point. Check the manual for the correct cartridge model.

What is the most common mistake with UPS sizing?+

Going by VA instead of watts and running the unit near its limit. A heavily loaded UPS gives less runtime and ages its battery faster. Keep the load below about 70 percent of the watt rating.

Is a replaceable battery worth the effort?+

Yes. The battery is the part that wears out, and replacing it costs far less than a new UPS. A sealed unit has to be replaced entirely. Over ten years, the saving adds up.

How long does a UPS battery last?+

Typically three to five years, depending on heat and how often it discharges. A hot room shortens life. Replace the battery when the unit reports a fault or runtime drops sharply.

Can I plug a laser printer or space heater into it?+

No. Laser printers draw large surges and heaters draw heavy continuous power, which can overload the UPS. Use the surge-only outlets or a separate wall socket for them.

Will it shut my PC down automatically?+

With a USB cable and the UPS software or the operating system's power settings, yes. The PC receives a signal on power failure and shuts down at a set battery level. Test it once by unplugging the UPS from the wall.

Final take

The APC BR1500MS2 is the best UPS with a replaceable battery, thanks to its pure sine wave output, named battery part and three-year warranty. The BX1500M gives the same capacity for less, and the BX1000M suits a single office PC. The BE650G1 and BE600M1 are low-cost choices for light loads.

More Ranked & Reviewed Guides

The 6 Best UPS Battery Backups for a Computer and Monitor, Ranked & Reviewed The 6 Best UPS Battery Backups for NAS Devices, Ranked & Reviewed The 6 Best UPS Battery Backups for Workstations and Render Rigs, Ranked & Reviewed