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Amazon Basics Standby UPS 400VA 255W Surge Protector Battery Power Backup, 6 Outlets - Black

4.3 4.3 out of 5 stars 11,370 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Computer Uninterruptible Power Supply Units by Amazon Basics
$56.86
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Standby
6 Outlet (400VA)
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Purchase options and add-ons

Brand Amazon Basics
Voltage 120 Volts
Color Black
Item Weight 3.8 Pounds
Form Factor Compact

About this item

  • Standby uninterruptible power supply (UPS) with 400VA / 255W battery backup; ideal for home networks, IoT devices, and home entertainment devices
  • 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
  • Note: Please check the total device power consumption when applying battery backup outlet; for optimal system performance, keep the load below 80% of the unit's rated capacity

Frequently bought together

Amazon Basics Standby UPS 400VA 255W Surge Protector Battery Power Backup, 6 Outlets - Black
$56.86
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CyberPower CP1500AVRLCD3 Intelligent LCD UPS System, 1500VA/900W, 12 Outlets, 2 USB Ports, AVR, Mini Tower, Black
$189.95
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CyberPower EC850LCD Ecologic Battery Backup & Surge Protector UPS System, 850VA/510W, 12 Outlets, ECO Mode, Compact, Uninterr
$109.95
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Customer reviews

4.3 out of 5 stars
4.3 out of 5
11,370 global ratings

Customers say

Customers like the ease of installation with the uninterruptible power supply. They say it's straightforward and easy to use. They appreciate the compact size and weight, saying it'll protect your equipment from electrical surges. However, some customers have reported issues with auto-restart and battery life. They mention that the unit does not auto restart after long power outages and requires manual restarting. Customers also have concerns about the noise level.

AI-generated from the text of customer reviews

350 customers mention290 positive60 negative

Customers like the value of the uninterruptible power supply. They say it's a solid investment and a great unit that saves them money.

"...These eliminate that.These are a very inexpensive way to give you a moment to close out what your working on and properly shut down whatever..." Read more

"...The price was fair and I really like their, "Backed by an AmazonBasics limited 1-year warranty, including the battery; $75,000 connected equipment..." Read more

"...Overall, so far it is looking like a good value for the money if you make sure to load it within it's capacity rating...." Read more

"...I think this is a good value considering it's just a Cyberpower rebadge and that it tends to work with open source software in addition to coming..." Read more

119 customers mention107 positive12 negative

Customers find the installation of the uninterruptible power supply straightforward, and the eight outlets provide ample connectivity. They also say the configuration software is decent and simple. Customers also mention that the user manual provides clear instructions and the Amazon UPS software is user-friendly. Overall, they say the product is ready to use and is trouble-free.

"...Simple plug and play install. I highly recommend." Read more

"...It was easy to get set up. The unit does exactly as it is supposed to do...." Read more

"...5/23/2024: I received the replacement batteries today, and installing them is easy...." Read more

"...Easy to set up, just plug in, one button push, and forget about it." Read more

83 customers mention76 positive7 negative

Customers are satisfied with the weight of the uninterruptible power supply. They mention that it's compact, lightweight, and does not require too much space. Some say that it fits the bill perfectly and is small enough with enough plugs to put those types of essentials on it.

"...This product is very good quality, and built compact and has plenty of outlets, with warning lights and sounds so your aware of your power/time that..." Read more

"...For a $45 unit I’m not expecting much, but let’s dig in. The unit is tiny, nice thick power cord with a right angle feed...." Read more

"...The design is compact and unobtrusive, easily fitting under my desk without taking up too much space...." Read more

"...And then have some other stuff plugged in on the surge side. Nice size, likely a 12 volt 5ah battery inside although I didn’t check...." Read more

860 customers mention455 positive405 negative

Customers are mixed about the performance of the power supply. Some mention that it works well, keeps things working, and is satisfied with its performance. However, others say that it fried after a surge and no longer works. Some say that the battery outlets wouldn't work and that it started failing after about 3.5 years.

"...The unit is working perfectly again. I have the router, Tablo, and Blink plugged into the battery-backup side...." Read more

"I have this since 2019. Now it doesn't work but that is totally understandible. The battery got old...." Read more

"...In our case…power flickers on our internet modem. This keeps things working without the 3-4 minute power cycle and boot up back to the internet..." Read more

"...All the equipment connected to it was fried after the surge and no longer works...." Read more

404 customers mention179 positive225 negative

Customers are mixed about the quality of the uninterruptible power supply. Some mention it's well built, reliable, and has robust surge protection. However, others say that it was damaged when they received it and that it fried itself and the equipment connected to it.

"...The battery apparently was failing because the unit would shut off and/or beep at random times. Bought a replacement battery from another retailer...." Read more

"...Standby UPS 600VA 360W Surge Protector Battery Power Backup has held up well. It was easy to get set up...." Read more

"...All the equipment connected to it was fried after the surge and no longer works...." Read more

"...Plastic finish is pretty good...." Read more

741 customers mention207 positive534 negative

Customers are dissatisfied with the battery life of the power supply. They mention that the power goes out more than ever, the battery is dead after 40 minutes, and the unit will run out of power shortly. Some say that the battery barely lasted 3 years.

"Purchased in 2018. The battery apparently was failing because the unit would shut off and/or beep at random times...." Read more

"...The power goes out more than ever and we are literally so connected now that many times a a day I think I would rather have internet than water!..." Read more

"...your laptop goes into battery save and uses its battery its great for short power outage and this device charges fast in 2 hours its mostly charged" Read more

"...kicked on and kept my internet-router working for a bit, but power was out for hours, so eventually the UPS ran out of power...." Read more

280 customers mention26 positive254 negative

Customers are dissatisfied with the noise produced by the power supply. They mention that it loudly beeps every time the PS5 is connected, it starts beeping every minute, and it has an audible buzz when plugged in. Some say that the battery alarm beepers and hums ever so slightly when a power failure occurs.

"...Very annoying! There is a way to turn it off or you need to check the manual. I wish it was off by default." Read more

"...just be my unit, when I plugged it in, I get a faint, but audible transformer buzz from it...." Read more

"...mode with the battery removed while the unit is enabled with loud disapproving noises...." Read more

"...about 50 minutes before the low power beep, once every 1/2 second, began to sound. I was hoping I could get at least 2 hours out of it...." Read more

83 customers mention12 positive71 negative

Customers are dissatisfied with the auto-reset of the power supply. They mention that it does not auto-start after long power outages and requires manual restarting. Some customers also report that the unit does not come back on again after an outage unless it is reconnected.

"...as I want it for a router & modem and it would be a pain if it does not auto restart...." Read more

"...The known fault is the inability to reset itself after power recovery so long as the battery is drained...." Read more

"...Now it works as well as it ever did.New note: It does not come back on again after an outage unless it is reconnected to AC power...." Read more

"...The software is a plus, but the lack of auto-restart is possibly a negative...." Read more

Works great for Mac Mini!
5 Stars
Works great for Mac Mini!
I bought this to keep my Mac Mini running during short power outages and to shut it down gracefully if the UPS runs out of power. I also chose this model because of the replaceable battery, and that it has a mute button!!I use the mini as a media server and for file backup. I connected the USB cable and it detected the UPS right away and I was able to configure shutdown settings without having to install any additional software!The manual says it provides 7 minutes of battery backup at half load (275 watts). The Mac Mini uses maybe 40 watts at a full load, so my non-scientific guess is I could manage a 45 minute power outage before it shuts itself down.
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Top reviews from the United States

BrgnHntr
5.0 out of 5 stars Updated Review
Reviewed in the United States on April 27, 2024
Size: StandbyStyle: 12 Outlet (800VA)Verified Purchase
Purchased in 2018. The battery apparently was failing because the unit would shut off and/or beep at random times. Bought a replacement battery from another retailer. The offered a cheaper price than Amazon. I didn't know if the unit was faulty so I preferred local returns. Installing the new battery was a little awkward but not that difficult. The unit is working perfectly again. I have the router, Tablo, and Blink plugged into the battery-backup side. The TV, CD player, and all the other units are plugged into the non-backup side. My only complaint is that there are no USB plugs but it's manageable with the USB-plug adapters.
6 people found this helpful
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AK
5.0 out of 5 stars Works Battery Replacement
Reviewed in the United States on April 29, 2024
Size: StandbyStyle: 6 Outlet (400VA)Verified Purchase
I have this since 2019. Now it doesn't work but that is totally understandible. The battery got old.

Here is the specs on the battery inside LEOCH CPS3.6-12 (12V2.9AH). LEOCH Battery Company Sealed Lead acid battery. It has to be replaceable!!!

It has worked for me for a long time. I recall the UPS in my application lasts about 10 minutes but that depends on the load and the battery life you have left.
4 people found this helpful
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Hoppy
5.0 out of 5 stars You need to get these!
Reviewed in the United States on February 3, 2024
Size: StandbyStyle: 8 Outlet (600VA)Verified Purchase
You know I kinda hate to admit this but the infrastructure in my area is in decline. The power goes out more than ever and we are literally so connected now that many times a a day I think I would rather have internet than water!
With this and as we get older we have decided to have a generator installed at our house. Last summer our electricity went out in June. Louisiana heat in June is no joke. Pushing 60 is also no joke. Pushing 60 with 104 heat index may make you not see 61.
My wife and I fled to another city. My sister and her husband stayed in their home.... for three days with no electric. It's one of those things. You always feel like it'll come back on in another hour... or by dark, by midnight... first thing in the morning.
By the time three days went by my poor sister would have been in tears but she was so dehydrated she couldn't cry. (yes she could have come to Dallas with us but they declined) Everyone affected had every bit of perishable food ruined. So after days with no electric... once it comes on the grocery stores also had no power... then it took a few days after power for them to get deliveries and then the stores were gutted for a solid week. The whole ordeal from power outage to power on to throwing out food to purchasing new food to back to normal was no kidding two weeks. It was awful and I wasn't even here. We fled. We are very fortunate to have another home in another state. All our food was ruined but we purchased food locally at our other home in Texas and just brought it back in coolers.
I say all that to say this. I purchased three of these Amazon UPS systems for our home. We are having a whole home generator installed. These power our modem our router and three of our Amazon EERO modules throughout our home.
In the past as soon as the power goes out it's internet out.
Now with these installed the power to those items goes through the battery. When the power goes out the things plugged in continue to work until the battery dies. I tested this. I have ATT fiber internet. I use Amazon EERO (which are amazing by the way) for my router with three additional modules for mesh coverage. My testing concluded that with just these items on the battery the Amazon UPS will give you about 1:45 before the battery dies and you now have no internet. It takes our new generator about 1 minute to sense a power outage, start and then put power back to the house. In this case our internet will never go down. In the past even with a split second surge it would take about 5 minutes for everything to come back online. These eliminate that.
These are a very inexpensive way to give you a moment to close out what your working on and properly shut down whatever is plugged into it. Simple plug and play install. I highly recommend.
40 people found this helpful
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Amazon Customer
4.0 out of 5 stars Works fine, but that beeping gets old fast!
Reviewed in the United States on March 11, 2024
Size: StandbyStyle: 6 Outlet (400VA)Verified Purchase
It's works as intended, but anytime there's a power outage it beeps every minute. Very annoying! There is a way to turn it off or you need to check the manual. I wish it was off by default.
3 people found this helpful
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Benjamin Taylor Watts
1.0 out of 5 stars False Advertising for the "AmazonBasics, $75,000 Connected Equipment Guarantee" - What a Joke
Reviewed in the United States on October 16, 2019
Size: StandbyStyle: 6 Outlet (400VA)Verified Purchase
We installed a WiFi network at my place of business and were looking for multiple UPS's for each of our switches and WiFi Access Points. When looking for what device would work best I came across this Amazon Branded piece of equipment. The price was fair and I really like their, "Backed by an AmazonBasics limited 1-year warranty, including the battery; $75,000 connected equipment guarantee" - the last bullet in the description.

This warranty is a joke. We had a power surge in our building and most of the UPS's worked as intended, however there was 1 that did not. All the equipment connected to it was fried after the surge and no longer works. Over $900.00 of equipment was destroyed (all of which was ordered from Amazon). I just wanted a credit I could, gift card, something! I had serial numbers and images of the equipment and everything. I immediately contacted customer support and told them that I wanted to submit an issue/claim under the "Backed by an AmazonBasics limited 1-year warranty, including the battery; $75,000 connected equipment guarantee."

I had to continue to reach back out to Amazon Customer Support 3+ times, each time they told me someone would follow up with me within the next 3-5 business days on my warranty claim. I spent a total of 4-5 hours (spread out over multiple days) of my time emailing, chatting over the phone, sending pictures, chatting online and still nothing has happened. I have continually been ignored and have been given false promises of, "I will PERSONALLY call you back on (x) date to follow up with you on this issue." Then, after no phone call or follow-up, I would email them back, only to have a different person respond and tell me to call Amazon Customer Support (which means I would start from scratch and have to tell my story all over again and go through the same steps). The continuous false promises and disregard (whether intentional or not) is beyond frustrating - especially when you buy the device because of the warranty that is promised.

I am a regular user of Amazon services, but I'm very disappointed with the way this situation was handled and I feel that I have wasted my time and have been ignored multiple times.

Not a product I would recommend buying.
2,656 people found this helpful
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Top reviews from other countries

Alan Paliwoda
5.0 out of 5 stars Very good value
Reviewed in Canada on May 6, 2024
Size: Line InteractiveStyle: 10 Outlet (1500VA)Verified Purchase
This works great even though I did have to wait a long time for it to arrive. Purchased on Black Friday sale so very good value. Amazon didn't have in stock and it didn't arrive for 3 months but worth the wait for the price.
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Tom S
5.0 out of 5 stars Working with Synology
Reviewed in Canada on March 31, 2024
Size: StandbyStyle: 8 Outlet (600VA)Verified Purchase
Just got this and charged it for 8 hours.

Shut down my Synology DS220+ connected the the USB CABLE that came with this UPS.

Booted up the NAS.
And it detected it.

Working well so far.
Customer image
Tom S
5.0 out of 5 stars Working with Synology
Reviewed in Canada on March 31, 2024
Just got this and charged it for 8 hours.

Shut down my Synology DS220+ connected the the USB CABLE that came with this UPS.

Booted up the NAS.
And it detected it.

Working well so far.
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Michael C.
5.0 out of 5 stars Simple and effective
Reviewed in Canada on March 28, 2024
Size: StandbyStyle: 12 Outlet (800VA)Verified Purchase
I specifically got this because there is no extra bells and whistles like digital displays and smart tech. We use those units at work and are constantly replacing them after warranty.
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PaulUptime
5.0 out of 5 stars Was a long wait getting it, but pleased with the product
Reviewed in Canada on March 2, 2024
Size: Line InteractiveStyle: 9 Outlet (1000VA)Verified Purchase
I'm happy it has replaceable batteries too.
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PL
5.0 out of 5 stars Battery backup
Reviewed in Canada on January 28, 2024
Size: StandbyStyle: 6 Outlet (400VA)Verified Purchase
Using for a battery backup for internet connection at our rural property. Allies us to access our wifi thermostat during power failures to track the indoor temp. We have had one power failure and seamless operation of the internet. Works great
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PL
5.0 out of 5 stars Battery backup
Reviewed in Canada on January 28, 2024
Using for a battery backup for internet connection at our rural property. Allies us to access our wifi thermostat during power failures to track the indoor temp. We have had one power failure and seamless operation of the internet. Works great
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3 people found this helpful
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