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Logitech K750 Wireless Solar Keyboard for Windows, 2.4GHz Wireless with USB Unifying Mini-Receiver, Ultra-Thin, Ecologically Made, PC/Laptop QWERTY UK Layout - Black

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499 ratings

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Connections	RF Wireless
Brand	Logitech
Keyboard Description	English Keyboard

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It doesn't get more hassle-free than this : The solar-powered case of this keyboard charges itself whenever there's light -and stays charged for at least three months in total darkness -so you can say goodbye to batteries, power bricks and charging cables
Sleek and ultra-thin : With sleek lines and a thin profile, this stylish, streamlined keyboard adds style to your workspace -whether you've got a laptop computer or desktop PC
Comfortable typing : Combining the best of traditional keyboards, laptops and a Logitech-only concave key cap design, you'll enjoy faster, quieter, feel-good typing -hour after hour
Advanced wireless : Logitech Advanced 2.4 GHz wireless connectivity gives you the same reliability of a cord plus wireless convenience and freedom. Fast data transmission, virtually no delays or dropouts and 128-bit AES encryption
Mini-receiver : The tiny Logitech Unifying receiver is small enough to stay in your laptop, so there's no need to unplug it when you move around. Plus, you can easily add a compatible mouse and gaming keyboard -without the hassle of multiple USB receivers

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This item:Logitech K750 Wireless Solar Keyboard for Windows, 2.4GHz Wireless with USB Unifying Mini-Receiver… £63.00
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Customer Rating	(499)	(1193)	(1095)	(340)	(2113)	(1382)
Price	£63.00	£60.99	£29.95	£23.99	£99.99	£99.99
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Sold By	Amazon.co.uk	Amazon.co.uk	Amazon.co.uk	ARTECK	Amazon.co.uk	Amazon.co.uk
Are batteries required?	No	Yes	Yes	Yes	No	Yes

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Product is sourced and shipped from the European Economic Area (EEA). Product is genuine original from manufacturer authorized distributors.

Energy efficiency class

Energy consumption

100 Kilowatt Hours Per Year per year, based on the power consumption of the television operating 4 hours per day for 365 days. The actual energy consumption will depend on how the television is used.

Product details

Style Name:Keyboard

User Guide [PDF ]
Batteries : 1 CR123A batteries required.
Is Discontinued By Manufacturer : No
Product Dimensions : 48.49 x 3.71 x 19.81 cm; 503.49 Grams
Date First Available : 1 Jan. 2010
Manufacturer : Logitech
ASIN : B004CLVFU2
Item model number : 920-002929
Department : Default Category
Delivery information:: We cannot deliver certain products outside mainland UK ( Details). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.

Best Sellers Rank: 11,122 in Computers & Accessories (See Top 100 in Computers & Accessories)
- 187 in Keyboards (Computers & Accessories)

Customer reviews:
499 ratings

Product description

Style Name:Keyboard

Product Description

Battery hassles are a thing of the past with the solar-powered Logitech Wireless Solar Keyboard K750. It charges itself whenever there's light, so you can say goodbye to batteries, power bricks and charging cables. And from the PVC-free construction to the fully recyclable box, this keyboard is designed to minimise its footprint. With sleek lines and a thin profile, this stylish, streamlined keyboard adds style to your workspace. Combining the best of traditional keyboards, laptops and a Logitech-only concave key cap design, you'll enjoy faster, quieter, feel-good typing -hour after hour. Plus, you'll get Logitech Advanced 2.4 GHz wireless and the tiny Logitech Unifying receiver.

Legal Disclaimer

Product is sourced and shipped from the European Economic Area (EEA). Product is genuine original from manufacturer authorized distributors.

From the manufacturer

Compatibility

Mac OS X 10.4 or laterUSB portLight source from sunlight and/or indoor lightingInternet connection (for software download)

Keyboard
Logitech Unifying receiver
Wireless extender
Cleaning cloth

Logitech Wireless Solar Keyboard K750

Battery hassles are a thing of the past with the light-powered Logitech Wireless Solar Keyboard K750 for Mac. It charges itself whenever there's light, so you can say goodbye to batteries, power bricks and charging cables and from the PVC-free construction to the fully recyclable box, this keyboard is designed to minimise its footprint. It's got all the standard Mac keys right where you expect them to be. With sleek lines and a thin profile, this streamlined keyboard adds style to your workspace. Logitech's concave key cap design means you'll enjoy faster, quieter, feel-good typing. Plus, you get Logitech Advanced 2.4 GHz wireless and the tiny Logitech Unifying receiver.

Light-powered

It doesn't get more hassle-free than this. This light-powered keyboard charges itself whenever there's light—and stays charged for at least three months, even in total darkness. Plus, the free Solar App provides a fun, handy lux meter and more, so you always know how much power you have. Download the Solar App.


Very thin At only 7.5-mm (1/3-inch) thick, it looks good—whether you've got a laptop or a desktop. Plus, with its rounded edges and thin profile, this stylish, streamlined keyboard is a joy to hold and behold.	Familiar Mac layout All the familiar Mac keys—plus a Mission Control hot key—are exactly where you expect them, including music and brightness controls, command keys and the eject key. And it all works right out of the box. No software installation required.	Feel-good typing Combining the best of traditional keyboards, laptops and a Logitech-only concave key cap design, you'll enjoy faster, quieter, feel-good typing—hour after hour.

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2 star		4%
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GSE27

This is a cracking keyboard - nice to type on

Reviewed in the United Kingdom on 1 December 2017

Style Name: KeyboardVerified Purchase

This is a cracking keyboard - nice to type on, solid feel, and compact on your desk whilst still having all the keys you want. Dim light is more than enough to keep the charge up.
I notice other reviews saying that it loses charge over time and is difficult to get enough light to recharge it properly - this is true, but it seems to be just the rechargeable battery wearing out. I have two of these keyboards and have found the battery performance starts to drop after about something like 8-12 months and the keyboard then won't charge as easily. Logitech say the battery is not replaceable, but it is - it's a rechargeable ML2032 button battery (don't put a CR2032 into it) - £3.50 on Amazon. The little battery holder just slides out the top of the keyboard like any other button battery holder. After replacing the battery it's good as new again.
I have two of these so I've got one spare - I tend to spill (black, no sugar) coffee on it occasionally - after which i quickly tip it upside down and shake it out, wipe it clean with a damp cloth and leave it upside down on a warm radiator for a week - it comes back to life properly after about 5 days on a radiator and works fine! done this three times so far :(
Dimensions if anyone needs them: LxWxD = 432x157x14mm (without the flip out feet out - the top is 27mm of the desk with the flip out feet out.
You can have multiple of these keyboards and other logitech devices all connected on the one dongle which is handy.

31 people found this helpful

Helpful

S. Lowther

I guess the solar panels gave up

Reviewed in the United Kingdom on 17 September 2017

Style Name: KeyboardVerified Purchase

I bought this keyboard precisely because it was 'solar powered' and so would save replacing batteries. When it arrived it was the US version and not the UK version I had ordered. OK I thought, I can put up with that, the keyboard works and was easy enough to setup with the unifying receiver and a Logitech unifying mouse, so I kept it. As commented by others the wireless range isn't huge but its OK for my requirements and I had used it for 4 years without a problem...

Then recently when I tried to pair the keyboard with a second unifying adaptor it apparently died.

Skip to now, after some effort the keyboard is not dead but no longer a 'solar powered' device.

Long story short, Logitech's built in obsolescence and has forced me to replace the rechargeable battery with a standard non-rechargeable battery and disconnect the solar panels. I'm looking for a different keyboard.

Short story long;
For some time, weeks AFAICR, the charge status LED on the keyboard had been showing red when the keyboard was switched on but flashed dimly green when the solar button was pressed. The solar app reported >500 LUX and 80-90% battery charge, there seemed to be no other noticeable issues. The keyboard was kept in the living room and connected to a media PC under the TV, so is not heavily used.

The first issue appeared when I tried to connect the keyboard and mouse to another unifying receiver so I could use them on another computer. The second receiver is the one supplied with the Logitech mouse and the mouse connected to it straight away. However, the keyboard could not be detected by the unifying app. Switching back to to the original receiver allowed the solar and unifying apps to see both mouse and keyboard.

The troubleshooting messages for failed pairing suggests that low battery charge could impede the pairing operation and the Logitech K750 FAQ on the Logitech support site agrees.

OK I thought, I need to get the keyboard fully charged before pairing to a new receiver, the solar app was reporting around 90% but the pressing the solar button flashes the red LED indicating low charge.

I switched off the keyboard and left it at the window for the day. The sunlight wasn't great but the Logitech FAQ says -
"Charging time — It takes about two hours to recharge the battery in direct sunlight when the battery charge is used up."
So I thought 7-8 hours should be more than enough to fully charge the last 10% and get the solar button to flash green, I was wrong.

Some googling and the the Logitech support site seem to suggest an alternate cause, existing pairing could hamper the keyboard from pairing with a new receiver. OK so maybe unpairing the keyboard from original receiver, before pairing to second receiver would get me somewhere. THAT WAS A MISTAKE, the keyboard still would not pair with the second receiver and now the original receiver could not find it either. Damn, now I had no keyboard.

Lesson for the day, DON'T UNPAIR THE DEVICE FROM A WORKING RECEIVER !!!

Some more googling, it appears some have had success by replacing the battery but the Logitech FAQ says -
"NOTE: The battery is not replaceable."
and -
"The K750 keyboard comes with a rechargeable ML2032 button-cell battery. It can't be replaced."
WTF! this is supposed to a be an alternative to replacing batteries, bad for the environment as well my pocket. The Logitech answer seems to be, replace the £50 keyboard for the sake of a £4 battery !!!

OK so maybe the issue is that the rechargeable battery has reached the end of its life. The keyboard was out of its 3 year warranty so I had nothing to lose, I ordered a new battery online.

When the replacement battery arrived, I installed it into the keyboard. Some force and a lot of care are required to extract the battery tray from the back of the keyboard without damaging it but it is possible. Search google and youtube to find instructions and videos that demonstrating the procedure.

So, new battery installed, I switched on the keyboard. No sign of life, the unifying app could not detect it and the solar button lit neither LEDs, red nor green. OK so maybe the new battery isn't charged, it was evening so I set the keyboard under a bright LED light (10W LED = 60W standard) for the night.

The following morning I found nothing had changed the unifying app still would not detect the keyboard and the solar button still lit neither LED. OK so maybe the the LED light isn't producing enough energy to charge the keyboard. I left the keyboard switched off at the window for the day, when I checked that evening there was still no change.

OK so maybe the replacement battery is a dud, I can put back the original battery and at least have a working keyboard right, WRONG!. When I had re-installed the original battery the unifying app would not detect the keyboard solar button would only flash the red LED.

Checking the charge of the original and the replacement ML2032 batteries, both showed a voltage around 2.9V, they both appeared to good, or at least as good as each other, so the dud replacement theory seems to be invalid. So I suspect the solar panels are no longer supplying enough current to fully charge the batteries, despite what the solar app says.

More googling, some adventurous souls had replaced the rechargeable ML2032 battery with an equivalent non-rechargeable CR2032 battery and managed to bring their keyboards back to life. The CR2032 battery is fairly standard so I found a pair of no-brand CR2032 batteries for £3.99 in a local high street shop. The voltage of the new CR2032 battery is around 3.2V.

The caveat when using non-rechargeable batteries is that you should not attempt to recharge them, they could EXPLODE !!! So the continuous charging from the the solar panels in the keyboard mean they have to be disconnected. Instructions can be found at ifixit.com - 'Logitech K750 Keyboard ML2032 to CR2032 battery replacement'

I have one comment on the instructions, I'm not sure if my amendment is necessary but I have completely removed the solar panels and the am only using the CR2032 to power the keyboard. I have unsoldered both of the the wires to the the solar panels from the PCB and built a solder bridge between the positive and negative solder pads on the board, effectively creating a jumper where the solar panel used to be.

This has given new life to my £50 keyboard for the sake of a £2 battery. The unifying app detected the keyboard and the solar app shows the battery charge at 100% and the status says 'Excellent', oh and the LUX meter is at 0, there are no solar panels. All that remains to be seen is how long the CR2032 battery will power the keyboard, comments on the ifixit instructions say the keyboard is still going strong after 3 months..

The other issue I have is with the a flawed design of unifying devices is a potential limit of 45 connections. The Logitech support site says -
"Most Unifying devices can connect with Unifying receivers an unlimited number of times. Some Unifying devices have a limit of forty-five (45) unique connections. If you're using such a device with multiple receivers, once you connect 45 times, you won't be able to connect to additional Unifying receivers. The device will continue to work with the last receiver it was connected to."
and
"You have two Unifying receivers: one on your laptop and one on your desktop. You use the same mouse with your laptop and desktop, and switch back and forth between the two Unifying receivers. Because your mouse is switching between two Unifying receivers, each time you connect, you use one of the total available connections. Eventually, you will hit the connection limit"

It is not clear whether the K750 keyboard is susceptible to this limit, Logitech do not appear to have published a definitive list of affected devices.

In conclusion;
After some effort I now have a working keyboard.
It no longer fulfils the criteria I originally purchased it for, I will have to replace the battery.
It may not fulfil my new requirement to have a single unified keyboard and mouse for two computers.
It will hopefully last long enough for me to find another solution, I doubt it will be Logitech.

13 people found this helpful

Helpful

Chris S.

my oldest bit of computer kit ... and still going

Reviewed in the United Kingdom on 7 April 2020

Style Name: KeyboardVerified Purchase

I've owned this keyboard since October 2011. It's now April 2020, and it is still going strong. I've just replaced the rechargeable battery for the second time, which is fiddly in terms of persuading the battery-holder out of the rear of the keyboard, but worth the struggle, and the plastic is forgiving rather than brittle. Just make sure you get the equivalent rechargeable type, and maybe look for a YouTube video to help, but it still takes some work to get in there.
It's lovely to type on, almost as good as my MacBook Air, and with fairly small fingers, I much prefer this more laptop-type design to work on. It's not back-lit and has no caps-lock light, but I've disabled cap-lock in Windows anyway, so that's not an issue for me. I only hope that once it finally dies (if it ever does!), I can still replace it with the same model.

4 people found this helpful

Helpful

Mr. E. R. G. Britten

Had two of these - both became unusable after about a month

Reviewed in the United Kingdom on 1 July 2020

Style Name: KeyboardVerified Purchase

In theory this is a nice piece of kit - its light and the keyboard is great. But they seem to have an issue - after a month or so of use they start stuttering on typing, and it gets worse and worse until you type something like this review and look up and realize the piece of crap stopped on the 4th word...arghhhh..then you have to switch it off and on, but sometimes that doesn't work and you then have to pull the usb receiver out and plug back in, and then it is ok again for an hour or so. I returned the first one of these because I thought it was a fault, but now the second one is displaying exactly the same behavior - new keyboard and new receiver. Having just done the usb out and in routine, I am still having to spell check the crap out of this as I type as it keeps missing letters out. I am really disappointed because I am a long time logitech fan - all my mice are MX models, and this keyboard seemed like a perfect wireless compliment - but as I have to do a lot of typing it is just not usable. Equally annoying when it decides to stop working in the middle of a game. Returning second one for a refund unfortunately. I wonder if these have been sat around in stock for a long time and deteriorated? There are a lot of positive reviews of this keyboard so they can't all behave like this. I even tried it on my other PC, behavior was identical after an hour or so.

2 people found this helpful

Helpful

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Logitech K750 Wireless Solar Keyboard for Windows, 2.4GHz Wireless with USB Unifying Mini-Receiver, Ultra-Thin, Ecologically Made, PC/Laptop QWERTY UK Layout - Black

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Product Description

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From the manufacturer

Compatibility

Logitech Wireless Solar Keyboard K750

Light-powered

Very thin

Familiar Mac layout

Feel-good typing

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