Eaton 3S 850B UPS - Off Line Uninterruptible Power Supply - 3S850B - 850VA (8 BS outlets, 2 USB Type-A ports, Quiet, Shutdown software) - USB interface (cable included) - Black&White: Amazon.co.uk: Computers & Accessories

From the manufacturer

3S BS

Ideal for application protection:

PC, peripherals and multimedia
TV, video and Hi-Fi equipment: Home cinema, digital decoders, etc...
Box Internet
Game Console
Office equipment

Inverter and multi-socket lightning arrestor

Off-Line Technology

Inverters for the protection of multimedia and computer equipment, both in professional and residential environments.

Eaton 3S 550/700/850 VA

The Eaton 3S UPS protects your IT equipment from everyday events that cause a power outage without warning.
Approx. 30 minutes battery life on standard application (replaceable batteries)
Modern and perfectly silent equipment, easy to integrate in an office environment.
Available in 6 BS (for 700VA and 850VA models) sockets + HID-compliant USB port (cable supplied) for automatic integration with most popular operating systems + 2 USB chargers (2A max)
Telephone/network/ethernet data line protection (700 VA & 850 VA)

Ease of integration and installation

Thanks to its attractive design, high gloss finish and quiet operation, the Eaton 3S fits perfectly into modern office environments.
It is equipped with 6 British Sockets (for 550 VA model) and 8 British Sockets (for 700VA and 850VA models) for easy connection of typical IT equipment, including peripherals.
The 700VA and 850VA models offer two USB ports (2A maximum) for even faster charging of all types of mobile devices (mobile phone, tablet, etc.).
All the different models have a USB HID port (cable supplied) for automatic integration with the most popular operating systems.
The compact unit can be placed on or under the table or fixed to the wall.
The batteries are easy to replace and thus extend the life of the inverter.

Eaton 3S BS 550 VA

1. 3 overvoltage-protected British Sockets (BS)

2. 3 corrugated and overvoltage-protected British Sockets (BS)

3. On/Off button

4. LED indicator

5. USB port

6. Replaceable battery

7. Reset button (circuit breaker)

8. Wall mounting

Eaton 3S BS 700 VA/850VA

1. 4 overvoltage-protected British Sockets (BS)

2. 4 corrugated and overvoltage-protected British Sockets (BS)

3. USB Charger

4. On/Off button

5. LED indicator

6. USB port

7. Tel/Fax/Data Line Protection

8. Replaceable battery

9. Reset button (circuit breaker)

10. Wall mounting


	Eaton 3S 550 BS	Eaton 3S 700 BS	Eaton 3S 850 BS
	See Details	See Details	See Details
Customer Reviews	314	314	314
Rated power (VA/Watt)	550VA / 330W	700VA / 420W	850 VA / 510 W
Exit sockets	3 sockets with battery backup and overvoltage protection + 3 sockets with overvoltage protection	4 sockets with battery backup and overvoltage protection + 4 sockets with overvoltage protection	4 sockets with battery backup and overvoltage protection + 4 sockets with overvoltage protection
Backup time: Desktop computer	8 minutes	16 minutes	20 minutes
Backup time: Advanced PC / Internet Box	4 minutes	6 minutes	9 minutes
USB Charger		2 USB ports (2A max)	2 USB ports (2A max)
Communication interface	HID-compatible USB port, automatic integration into most popular operating systems (Windows XP/Vista/7, Linux, Mac OS X), cable supplied	HID-compatible USB port, automatic integration into most popular operating systems (Windows XP/Vista/7, Linux, Mac OS X), cable supplied	HID-compatible USB port, automatic integration into most popular operating systems (Windows XP/Vista/7, Linux, Mac OS X), cable supplied
Line protection		Phone/Fax/Modem/Internet and Ethernet	Phone/Fax/Modem/Internet and Ethernet
Standard	IEC/EN 62040-1-1, CE marking / EN 62040-2	IEC/EN 62040-1-1, CE marking / EN 62040-2	IEC/EN 62040-1-1, CE marking / EN 62040-2
Dimensions W x H x D (mm)	325x86x140	335x86x170	335x86x170
Weight	3,2 kg	4 kg	4,3 kg

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Product details

Language ‏ : ‎ English
Product Dimensions ‏ : ‎ 33.5 x 8.6 x 17 cm; 3.8 kg
Date First Available ‏ : ‎ 10 Jun. 2022
Manufacturer ‏ : ‎ Eaton
ASIN ‏ : ‎ B0B3RQN8QT
Item model number ‏ : ‎ 3S
Guaranteed software updates until ‏ : ‎ unknown

Best Sellers Rank: 11,289 in Computers & Accessories (See Top 100 in Computers & Accessories)
- 7 in Computer Uninterruptible Power Supply Units

Customer reviews:
4.2 314 ratings

Customer reviews

314 global ratings

How customer reviews and ratings work

Customers say

Customers like the value of the power supply, saying it's great value. They're also happy with the ease of installation. However, some customers have reported compatibility issues with the provided adaptors. Opinions are mixed on size, battery efficiency, noise, performance, and quality.

AI-generated from the text of customer reviews

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Performance Ease of installation Value Battery efficiency Quality Size Noise Connector compatibility

53 customers mention ‘Performance’37 positive16 negative

Customers are mixed about the performance of the power supply. Some mention that it works a treat, has good overall performance, and is reliable. However, others say that it's useless and not ideal for some users.

"...For the price, it's a decent unit and does the job I bought it for...." Read more

"...I am very pleased with my purchase which is performing flawlessly and wouldn't want to be without it." Read more

"...be plugged, but apart from being bulky, this is not an efficient or cost effective solution...." Read more

"...these we have had a couple of cuts and each time, the UPS allowed me to save everything and shut down safely...." Read more

34 customers mention ‘Ease of installation’31 positive3 negative

Customers find the installation of the uninterruptible power supply to be easy. They mention that it's simple to mount and use, and does the job with no fuss or nonsense. Some say that the refund process was easy to use.

"...Arrived in a couple of days. Easy to set up. Although it has 4 dc power outputs the default setting is 12V, fine for the BT hub we have...." Read more

"...There's 2 year warranty on the device. Registering was OK , but a bit tricky as the serial number I entered didnt seem to match their records,..." Read more

"...I could plug something else into it like a network switch.... Easy to set up and use though, and does what it says on the tin." Read more

"...It’s pretty easy to set up and comes 75% charged. Having had a few power cuts I can confirm it works fine...." Read more

13 customers mention ‘Value’13 positive0 negative

Customers appreciate the value of the uninterruptible power supply.

"This product has no drawbacks. It is competively priced, has 8x UK sockets (not stupid EC ones) , 2x USB for phone charging/boiler access point and..." Read more

"This is excellent value, compared to other products of the same power...." Read more

"...On the face of it it's great value, but new batteries one a year make it an expensive proposition" Read more

"...Great value for money and easy to walk mount with a few screws." Read more

32 customers mention ‘Battery efficiency’16 positive16 negative

Customers are mixed about the battery efficiency of the power supply. Some mention that it will keep your power going, even during a power cut, for up to 20 minutes, and provides enough back up power for both chairs to return to a sit position. However, others say that the device stopped supplying power after approximately 10 minutes, the internal batteries died after 18 months, and the battery didn't hold a charge at all.

"...features, like switchable output voltage level and a relatively high supply rating of 36Watts...." Read more

"...great during a power cut yesterday, but one of them instantly dropped the output power.They are all around 12 months old...." Read more

"...it seemed to do its job protecting our broadband modem and kept the broadband running when short power failures occurred...." Read more

"...this takes up a lot more space than the mini, and in theory is less efficient since it is converting AC to DC and back to AC to power the modem/..." Read more

28 customers mention ‘Quality’18 positive10 negative

Customers are mixed about the quality of the uninterruptible power supply. Some mention it's well-made, reliable, and solid. However, others say it went faulty after less than a year and the company refuses to reply to emails.

"...For the price, it's a decent unit and does the job I bought it for...." Read more

"...Sorry, Eaton. Unless I'm mistaken and the one unit is faulty, then you will need to release a revision 2.0 which includes proper cell..." Read more

"...Nicely made mini UPS from a recognisable name, with a 2 year warranty its got the feel of a quality product. Well documented...." Read more

"...The unit itself is a brick, its solid construction, and fairly heavy . I have it on the floor under my desk...." Read more

17 customers mention ‘Size’11 positive6 negative

Customers are mixed about the size of the uninterruptible power supply. Some mention it's small, compact, and easily hidden behind one of the devices. Others say the Eaton plug is itself a bit bulky, the unit is quite heavy, and the overall capacity is a fairly small but usable 11.9Wh.

"A great looking and compact UPS and easy to mount...." Read more

"...is only space to include 2 off 2200mAH lion cells, so overall capacity is a fairly small but usable 11.9Wh (measured)...." Read more

"...Although it is large in size, it's easily hidden behind one of the chairs and is very quiet...." Read more

"...Small and unobtrusive. Two minor complaints. Not intuitive to switch voltage. Had to read/re-read the instructions...." Read more

13 customers mention ‘Noise’9 positive4 negative

Customers are mixed about the noise produced by the uninterruptible power supply. Some mention it's very quiet, while others say it makes an unacceptable beeping noise and high-pitched noises. Some customers also report that there's no audio warning to indicate 240V power failure.

"...It doesn’t seem to get overly warm and is very quiet.Recommended.Update Sept 23...." Read more

"...is large in size, it's easily hidden behind one of the chairs and is very quiet...." Read more

"...The case would benefit from some mounting holes and there's also no audio warning to indicate 240V power failure...." Read more

"...But was easy to install, it's quite small plus no noise but it gets quite warm, not bad for price." Read more

11 customers mention ‘Connector compatibility’0 positive11 negative

Customers are dissatisfied with the connector compatibility of the power supply. They mention that the supplied adaptors do not fit their routers and that the barrel connectors are not common. Some customers also report that the adaptor does not fit the BT SmartHub 2.

"...that the device I wanted it for turned out to have an uncommon diameter of barrel connector—definitely not compatible with the ones supplied...." Read more

"...There was no barrel connector which fitted by BT hub, so I cannibalised one from an old BT power supply...." Read more

"...Had to read/re-read the instructions. Also, it didn’t come with adapters suitable for my ASUs router...." Read more

"...this is not the fault of this product, but due to BT using a strange connector size, presumably so they can flog their own UPS." Read more

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BigBadBaz

Simple and effective.

Reviewed in the United Kingdom on 28 May 2024

Country format: United KingdomSize Name: 850 VA / With BSVerified Purchase

I have it hooked up to all my home entertainment to protect it from surges and it's kept my PS4 safe during a couple of power outages.

One person found this helpful

Helpful

Hayward

Perfect for my needs.

Reviewed in the United Kingdom on 10 April 2024

Country format: United KingdomSize Name: 700 VA / With BSVerified Purchase

I bought this to keep my home server and gaming PC safe during the occasional power spike or someone in the household tripping the circuit breaker. So far it's been great and has saved me a few times already. So far I've only experience power spikes or outages for less than a minute, most times it's just a second or two. For the price, it's a decent unit and does the job I bought it for. There are plenty of sockets for your gadgets, and the USB ports are perfect for those charging cables you always need handy!

Excellent protection for those unexpected power cuts or power spikes!

Helpful

Snapperfire

Good effort, edited 2years later

Reviewed in the United Kingdom on 6 January 2022

Country format: United KingdomSize Name: Mini UPS 36W 9/12/15/19V DCVerified Purchase

Edit. 2 years later I’ve repeated some full discharge and recharge tests, including discharging it at the max rated 36Watts and unlike others still have has no problems with the recharge sequence. The failure of the low cell voltage protection reported by some hasn’t occurred on my unit. This Eaton3S and the APC CP12036Li remain the best options available for anyone looking for a small DC UPS with a recognised name.

Nicely made mini UPS from a recognisable name, with a 2 year warranty its got the feel of a quality product. Well documented. It has some nice features, like switchable output voltage level and a relatively high supply rating of 36Watts. I've run some12V load tests when on battery and the output voltage only dropped from 11.9V@0.5A to 11.3V@3A. The DC output level was also maintained well as the battery ran low . By including the AC/DC conversion inside the unit there is only space to include 2 off 2200mAH lion cells, so overall capacity is a fairly small but usable 11.9Wh (measured). So it should be able to run a typical small router (5-6Watts) for around 2hours, that's probably long enough for most typical mains power interruptions.

The battery recharge rate is a relatively low 4Watts so once mains power is restored it does take around 5Hours to fully recharge . Once fully charged the UPS appears to use <1W to manage its own functions

To make it a better prospect than its competitor MiniDC UPS What it ideally needs is either larger internal batteries or perhaps the ability to recharge from an external powerbank. The case would benefit from some mounting holes and there's also no audio warning to indicate 240V power failure. It is however one of the few MiniDC UPS that I'd be content to leave running unattended in my house 24/7/365.

20 people found this helpful

Helpful

SteveP

Back up power for a BT modem? This seems to do the trick.

Reviewed in the United Kingdom on 24 June 2024

Country format: United KingdomSize Name: Mini UPS 36W 9/12/15/19V DCVerified Purchase

I live in an area subject to irregular, but relatively frequent, power cuts. Four in the last month, each for a variety of reasons, and each lasting a couple of hours or so. The usual apologies from the supplier (Northern Powergrid) but no confidence matters will improve anytime soon. When they're blaming squirrels you know you're in trouble...

Unfortunately, the mobile networks go down too, so our entire village goes off the comms grid. With BT digital voice allegedly coming next year we will be deprived even the trusty landline. So some kind of contingency makes sense, if only for emergencies. There are any number of these units on Amazon, and you have to pick one, so the Eaton 3S mini was it. Arrived in a couple of days. Easy to set up. Although it has 4 dc power outputs the default setting is 12V, fine for the BT hub we have. There are 4 barrel connectors included, one being 3.00mm which is compatible with the modem. It fits, and that's good enough for me.

Took about 10 mins max to install, let it charge overnight, then switched off the mains power to the hub this morning. The latter continued to function. So far so good.

We'll have to wait for another power cut to test in in real world conditions, but assuming the back up batteries in the BT street boxes are good for a couple of hours then we should be ok. We'll see.

Update 4 July 2024
Another power cut this afternoon. 6 now in 7 weeks. Step forward Northern Powergrid...
We were reconnected to the mains supply after 1 hour 45 mins or so. The backup battery kept us connected but judging by the status lights on the front I guess we had another 15 mins tops. So 2 hours powering a standard BT modem

Helpful

Anna

Batteries failed prematurely - may have no minimum voltage cut-off

Reviewed in the United Kingdom on 9 July 2023

Country format: United KingdomSize Name: Mini UPS 36W 9/12/15/19V DCVerified Purchase

I own three of these units. Two worked great during a power cut yesterday, but one of them instantly dropped the output power.

They are all around 12 months old.

The one unit which failed had actually been fully discharged once, several months ago during a previous power cut. The other two units did not fully discharge, because they have very light loads (~3 watts vs the ~9 watts attached to the failed unit).

Both of the lipo cells inside (TP LI-ION 3.7V ICR18650 2200mAh MH46259 UD020) now read at roughly 0.125 volts, so my /assumption/ is that these are unprotected cells and the unit itself does not have a low-voltage automatic cutoff.

This is extremely problematic, because whenever there's a lengthy power cut, there is a solid risk that the unit itself will then be bricked unless you want to manually replace the lipo cells inside.

So I'm afraid I need to give the "overall rating" as just one star because of this. Sorry, Eaton. Unless I'm mistaken and the one unit is faulty, then you will need to release a revision 2.0 which includes proper cell protection.

Ideally they would auto power-off at, say, 20% power remaining. Perhaps even make the percentage/voltage configurable with a DIP switch somewhere, but obviously a DIP switch would add slightly to the materials cost & the plastics would need redesigning, so a straightforward X% cut-off would be the most reasonable thing to implement.

14 people found this helpful

Helpful

A. Laird

Good design and quality, but incompatible connectors

Reviewed in the United Kingdom on 7 June 2024

Country format: United KingdomSize Name: Mini UPS 36W 9/12/15/19V DCVerified Purchase

This would have been ideal, except that the device I wanted it for turned out to have an uncommon diameter of barrel connector—definitely not compatible with the ones supplied. It would be very useful if Eaton changed the connector jack to a standard barrel connector that would be compatible with third party adapter connectors that cover a much wider range of diameters (external and internal). UPS returned, but not because of any issues with its quality, which seemed excellent.

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Brand	Eaton
Battery cell composition	Sealed Lead Acid
Voltage	230 Volts
Colour	Black and white
Amperage	10 Amps

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Eaton 3S 850B UPS - Off Line Uninterruptible Power Supply - 3S850B - 850VA (8 BS outlets, 2 USB Type-A ports, Quiet, Shutdown software) - USB interface (cable included) - Black&White – United Kingdom

About this item

Brand in this category on Amazon

From the manufacturer

Ideal for application protection:

Inverter and multi-socket lightning arrestor

Off-Line Technology

Ease of integration and installation

Eaton 3S BS 550 VA

Eaton 3S BS 700 VA/850VA

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Product details

Brands in this category on Amazon

Customer reviews

Customers say

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