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Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black

Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black

Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
Logitech K750 Wireless Solar Keyboard for Windows Solar Recharging Keyboard 2.4GHz Wireless - Black
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Features

  • Solar-powered keyboard: No battery hassles - any light source keeps your keyboard charged for at least three months in total darkness
  • Only 1/3-inch thick: Ultra-thin design adds sleek style to your workspace
  • Feel-good typing: Logitech-only concave key cap design for faster, quieter, more comfortable typing
  • Powerful 2.4 GHz wireless: Enjoy a reliable connection using a tiny Logitech Unifying receiver that stays in your computer
  • System Requirements-Windows XP, Windows Vista , Windows 7, Windows 8, Windows 10. Light source from sunlight and/or indoor lighting .Not for Mac

Description

Battery hassles are a thing of the past with the solar-powered Logitech Wireless Solar Keyboard K750. System Requirements: Windows XP Windows Vista Windows 7 Windows 8 Windows 10|USB port|Light source from sunlight and/or indoor lighting Enlarge If you've got light, you've got power This solar-powered keyboard makes battery hassles a thing of the past. The keyboard charges itself with any light, including the one on your desk. So you can say goodbye to battery changes and charging cables—all with a streamlined design that looks and feels great. Download a spec sheet Powered by light. Charged by sunlight or artificial light. Which Logitech Keyboard Is Right For You?


Wireless Type 2.4 GHz Radio Frequency


Brand Name Logitech


Series K750 Wireless Solar Keyboard


Item model number 920-002912


Hardware Platform PC


Operating System windows xp, windows vista, windows 8, windows 7, windows 10


Item Weight 1.65 pounds


Product Dimensions 7.9 x 1.4 x 19.1 inches


Item Dimensions L x W x H 7.87 x 1.38 x 19.09 inches


Color Black


Power Source Solar


Batteries 2 AA batteries required.


ASIN B004MF11MU


Customer Reviews 4.0 out of 5 stars 3,408 ratings 4.0 out of 5 stars


Best Sellers Rank #25 in Computer Keyboards


Shipping Weight 2.35 pounds (View shipping rates and policies)


Date First Available March 17, 2011


Shipping

This product includes free shipping to all US addresses.


Delivery

Unless otherwise stated above, most products arrive within 2-3 business days. Larger items may take 6-9 business days. Tracking information will be automatically provided as soon as your order ships.


View our full shipping policy here.

Returns

This product can be returned within 30 days of delivery for a full refund. Please visit our returns center to begin a return.

View our full returns policy here.

Features

  • Solar-powered keyboard: No battery hassles - any light source keeps your keyboard charged for at least three months in total darkness
  • Only 1/3-inch thick: Ultra-thin design adds sleek style to your workspace
  • Feel-good typing: Logitech-only concave key cap design for faster, quieter, more comfortable typing
  • Powerful 2.4 GHz wireless: Enjoy a reliable connection using a tiny Logitech Unifying receiver that stays in your computer
  • System Requirements-Windows XP, Windows Vista , Windows 7, Windows 8, Windows 10. Light source from sunlight and/or indoor lighting .Not for Mac

Description

Battery hassles are a thing of the past with the solar-powered Logitech Wireless Solar Keyboard K750. System Requirements: Windows XP Windows Vista Windows 7 Windows 8 Windows 10|USB port|Light source from sunlight and/or indoor lighting Enlarge If you've got light, you've got power This solar-powered keyboard makes battery hassles a thing of the past. The keyboard charges itself with any light, including the one on your desk. So you can say goodbye to battery changes and charging cables—all with a streamlined design that looks and feels great. Download a spec sheet Powered by light. Charged by sunlight or artificial light. Which Logitech Keyboard Is Right For You?


Wireless Type 2.4 GHz Radio Frequency


Brand Name Logitech


Series K750 Wireless Solar Keyboard


Item model number 920-002912


Hardware Platform PC


Operating System windows xp, windows vista, windows 8, windows 7, windows 10


Item Weight 1.65 pounds


Product Dimensions 7.9 x 1.4 x 19.1 inches


Item Dimensions L x W x H 7.87 x 1.38 x 19.09 inches


Color Black


Power Source Solar


Batteries 2 AA batteries required.


ASIN B004MF11MU


Customer Reviews 4.0 out of 5 stars 3,408 ratings 4.0 out of 5 stars


Best Sellers Rank #25 in Computer Keyboards


Shipping Weight 2.35 pounds (View shipping rates and policies)


Date First Available March 17, 2011


Shipping

This product includes free shipping to all US addresses.


Delivery

Unless otherwise stated above, most products arrive within 2-3 business days. Larger items may take 6-9 business days. Tracking information will be automatically provided as soon as your order ships.


View our full shipping policy here.

Returns

This product can be returned within 30 days of delivery for a full refund. Please visit our returns center to begin a return.

View our full returns policy here.

Features

  • Solar-powered keyboard: No battery hassles - any light source keeps your keyboard charged for at least three months in total darkness
  • Only 1/3-inch thick: Ultra-thin design adds sleek style to your workspace
  • Feel-good typing: Logitech-only concave key cap design for faster, quieter, more comfortable typing
  • Powerful 2.4 GHz wireless: Enjoy a reliable connection using a tiny Logitech Unifying receiver that stays in your computer
  • System Requirements-Windows XP, Windows Vista , Windows 7, Windows 8, Windows 10. Light source from sunlight and/or indoor lighting .Not for Mac

Description

Battery hassles are a thing of the past with the solar-powered Logitech Wireless Solar Keyboard K750. System Requirements: Windows XP Windows Vista Windows 7 Windows 8 Windows 10|USB port|Light source from sunlight and/or indoor lighting Enlarge If you've got light, you've got power This solar-powered keyboard makes battery hassles a thing of the past. The keyboard charges itself with any light, including the one on your desk. So you can say goodbye to battery changes and charging cables—all with a streamlined design that looks and feels great. Download a spec sheet Powered by light. Charged by sunlight or artificial light. Which Logitech Keyboard Is Right For You?


Wireless Type 2.4 GHz Radio Frequency


Brand Name Logitech


Series K750 Wireless Solar Keyboard


Item model number 920-002912


Hardware Platform PC


Operating System windows xp, windows vista, windows 8, windows 7, windows 10


Item Weight 1.65 pounds


Product Dimensions 7.9 x 1.4 x 19.1 inches


Item Dimensions L x W x H 7.87 x 1.38 x 19.09 inches


Color Black


Power Source Solar


Batteries 2 AA batteries required.


ASIN B004MF11MU


Customer Reviews 4.0 out of 5 stars 3,408 ratings 4.0 out of 5 stars


Best Sellers Rank #25 in Computer Keyboards


Shipping Weight 2.35 pounds (View shipping rates and policies)


Date First Available March 17, 2011


abunda_amazon_reviews First off, I really like the way this keyboard feels, and when it works, it's awesome. Unlike others, I have had no issues with battery life; it's at 98% right now after using it all day today. However, I currently have a K750 which is a replacement for a previous K750 I had, which also eventually had the problem that caused me to replace it with this current one. The problem is that sometimes, the keyboard will just... stop sending keystrokes to the computer. Or it'll delay sending them for a second or two or five. Or it'll double-up on a single keypress. Or triple-up. Or it'll duplicate a series of keystrokes. -- begin demmonstrationin of the problem -- If yoou type a lot, having to constantly go back and edit things youu typed correctly but that the kkeyboard sent iincorrectly to the computer is aggravating beyond all rrecokoning. This lasstt section heere was typed without ccorrecting the wooords after the fact - I've just left the text as the keyboard sent it too the computer (after typing everything carefull y and correctly, though quickly). If your keyboard did thhiss to you, would you give? (that should read 'give it more than one star', but the keyboard didn't transmit the part after 'give' to the computer so I had to retype it here so you'd understand what I was trying to say and that I'm not a complete lunatic) (good times);;Reviewed in the United States on September 12, 2016;;1.0 out of 5 stars;;Awesome until it's a complete disaster;;Tiffany;;/gp/customer-reviews/R1QZT352KO22W/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B004MF11MU;;;If I had written this review two years ago this would have been 5 stars. Great feel, very similar to my Microsoft equivalent and to top it off solar powered. That's where I was wrong! As many others are slowly discovering this is a disposable keyboard, that is to say after 2-3 years its very likely your battery which holds the solar charge dies. That battery is not user replicable so you are left with a useless lump of shiny plastic destined for landfill! This isn’t even touching on the environmental ethics of making such a product which would otherwise last many many years, disposable. Makes good business sense from Logiech’s point of view, but not so much from mine as a consumer. After many weeks of arguing with Logitech and them refusing to replace it or repair it, I tried to change the battery myself. Even if you can find the correct type of battery, the keyboard wont then bind with the computer after replacement. So, in the bin it goes!!! With Logitech's stance on the battery issue, I can in no way recommend this product and I will (partly out of spite, and partly due to poor product design and customer service) not be buying another Logitech keyboard. A keyboard at this price is not a product that should need to be replaced every 2-3 years!!;;Reviewed in the United States on February 10, 2017;;1.0 out of 5 stars;;Logitech, I used to love your products but in this, you have let me down!;;Fly4trade;;/gp/customer-reviews/R2LRS0VU4GZYLC/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B004MF11MU;;;So I have had the Logitech Wireless Solar Keyboard (the original when it first came out) for almost 6 years now! Bought it back in September 2011, when solar keyboard was quite the novelty (at least in my opinion). Love it and ready to buy another one (NOT as a replacement) for my new office. The original one is still going strong, allowing me to write this review. Now, as much as I love this keyboard, I did have to replace the rechargeable 3V Lithium button cell battery in 2016. The battery at that time cost $6, well worth it considering that it brought life back to my favorite keyboard. This means the original rechargeable button cell battery that came with the keyboard lasted more than 4 years! In summary: Pro: Durable, comfortable, sleek, elegant, and contemporary looking. Con: None *Even the price has come down, bought it for nearly $20 more 6 years ago!Maxell ML2032 Rechargable 3V coin cell lithium motherboard cmos battery;;Reviewed in the United States on June 14, 2017;;5.0 out of 5 stars;;Love it and ready to buy another one (NOT as ...;;buy.A.T.30.C.E.L.L.at.50;;/gp/customer-reviews/R35EJP18RWL3SH/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B004MF11MU;;;You know. A friend of mine has this keyboard! It was WONDERFUL! I loved the heft, the design, its being solar. It's been a month and eleven days. The battery per manufacturer boasting is supposed to last 'three months in utter darkness'. It does not. It's had to be charged twice since I bought it. It stops working when the battery is at 30%. Even with the maximum amount of light it can accept to charge, it takes it THREE. DAYS. to charge back up, WITHOUT BEING USED. Mine won't even charge back up to full! It stops charging at 92% and won't consider going up past that, even when left alone to charge for an additional day solid. I understand it turning off at 30% because if a battery gets lower than that, it's bad for it, but it is still INFURIATING to have bought a keyboard explicitly for long battery life and being a bit greener, and done everything you can short of deciding to sit under an INDUSTRIAL GARDEN GROW LAMP ALL DAY and the product doesn't deliver as it says it's supposed to. Update 6/11/2018 - I contacted Logitech for a replacement, and they sent one gladly. It seemed to work great for a while, but after two months it too seems to have broken. The second one is now not charging correctly.;;Reviewed in the United States on March 26, 2018;;2.0 out of 5 stars;;I can't in good faith recommend this keyboard.;;Myfi;;/gp/customer-reviews/R1ZQ7NDARV7PPL/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B004MF11MU;;;Logitech K750 Wireless Solar Keyboard Works well. The battery died after about 2.5 years of use. Although the manufacturer states that the battery is not replaceable, I pulled out the carrier and discovered that the battery was a rechargeable ML2032 lithium button cell. It had a label that warned you not to replace the battery. Well the keyboard is dead without a battery so I went ahead and put a fresh ML2032 in the carrier. The keyboard has worked just fine since replacing the battery (about 1.5 years ago). Today the Mac version of this keyboard died (battery lasted about 3.5 years on the Mac version). Same thing-replace the battery and the keyboard is working again. Photos attached from the replacement of the battery on the Mac version of the keyboard. Photos show the battery carrier partially pulled out from the keyboard, removed from the keyboard, battery removed from carrier-note battery type with label pulled back and Solar App report after battery replaced. Note that a 2032 battery has a nominal capacity of 0.21 WH and could generate some heat if shorted. If you replace with a ML2032 or LIR 2032 you should have no problems. A non-rechargeable CR2032 may be a different matter. Note that Amazon has these batteries for sale. Your local retailer is not likely to have them.;;Reviewed in the United States on September 28, 2017;;5.0 out of 5 stars;;Great wireless solar keyboard-needs rechargeable 2032 version of battery when the battery dies.;;Charles C. White Jr.;;/gp/customer-reviews/RSX6XY0AC4A5N/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B004MF11MU

Shipping

This product includes free shipping to all US addresses.


Delivery

Orders placed now will arrive in 6-9 business days. Tracking information will be automatically provided as soon as your order ships.


View our full shipping policy here.

Returns

This product can be returned within 30 days of delivery for a full refund. Please visit our returns center to begin a return.

View our full returns policy here.

Top Amazon Reviews


1.0 out of 5 stars
By Tiffany - Reviewed in the United States on September 12, 2016
Awesome until it's a complete disaster
First off, I really like the way this keyboard feels, and when it works, it's awesome. Unlike others, I have had no issues with battery life; it's at 98% right now after using it all day today. However, I currently have a K750 which is a replacement for a previous K750 I had, which also eventually had the problem that caused me to replace it with this current one. The problem is that sometimes, the keyboard will just... stop sending keystrokes to the computer. Or it'll delay sending them for a second or two or five. Or it'll double-up on a single keypress. Or triple-up. Or it'll duplicate a series of keystrokes. -- begin demmonstrationin of the problem -- If yoou type a lot, having to constantly go back and edit things youu typed correctly but that the kkeyboard sent iincorrectly to the computer is aggravating beyond all rrecokoning. This lasstt section heere was typed without ccorrecting the wooords after the fact - I've just left the text as the keyboard sent it too the computer (after typing everything carefull y and correctly, though quickly). If your keyboard did thhiss to you, would you give? (that should read 'give it more than one star', but the keyboard didn't transmit the part after 'give' to the computer so I had to retype it here so you'd understand what I was trying to say and that I'm not a complete lunatic) (good times)

1.0 out of 5 stars
By Fly4trade - Reviewed in the United States on February 10, 2017
Logitech, I used to love your products but in this, you have let me down!
If I had written this review two years ago this would have been 5 stars. Great feel, very similar to my Microsoft equivalent and to top it off solar powered. That's where I was wrong! As many others are slowly discovering this is a disposable keyboard, that is to say after 2-3 years its very likely your battery which holds the solar charge dies. That battery is not user replicable so you are left with a useless lump of shiny plastic destined for landfill! This isn’t even touching on the environmental ethics of making such a product which would otherwise last many many years, disposable. Makes good business sense from Logiech’s point of view, but not so much from mine as a consumer. After many weeks of arguing with Logitech and them refusing to replace it or repair it, I tried to change the battery myself. Even if you can find the correct type of battery, the keyboard wont then bind with the computer after replacement. So, in the bin it goes!!! With Logitech's stance on the battery issue, I can in no way recommend this product and I will (partly out of spite, and partly due to poor product design and customer service) not be buying another Logitech keyboard. A keyboard at this price is not a product that should need to be replaced every 2-3 years!!

5.0 out of 5 stars
By buy.A.T.30.C.E.L.L.at.50 - Reviewed in the United States on June 14, 2017
Love it and ready to buy another one (NOT as ...
So I have had the Logitech Wireless Solar Keyboard (the original when it first came out) for almost 6 years now! Bought it back in September 2011, when solar keyboard was quite the novelty (at least in my opinion). Love it and ready to buy another one (NOT as a replacement) for my new office. The original one is still going strong, allowing me to write this review. Now, as much as I love this keyboard, I did have to replace the rechargeable 3V Lithium button cell battery in 2016. The battery at that time cost $6, well worth it considering that it brought life back to my favorite keyboard. This means the original rechargeable button cell battery that came with the keyboard lasted more than 4 years! In summary: Pro: Durable, comfortable, sleek, elegant, and contemporary looking. Con: None *Even the price has come down, bought it for nearly $20 more 6 years ago!Maxell ML2032 Rechargable 3V coin cell lithium motherboard cmos battery

2.0 out of 5 stars
By Myfi - Reviewed in the United States on March 26, 2018
I can't in good faith recommend this keyboard.
You know. A friend of mine has this keyboard! It was WONDERFUL! I loved the heft, the design, its being solar. It's been a month and eleven days. The battery per manufacturer boasting is supposed to last 'three months in utter darkness'. It does not. It's had to be charged twice since I bought it. It stops working when the battery is at 30%. Even with the maximum amount of light it can accept to charge, it takes it THREE. DAYS. to charge back up, WITHOUT BEING USED. Mine won't even charge back up to full! It stops charging at 92% and won't consider going up past that, even when left alone to charge for an additional day solid. I understand it turning off at 30% because if a battery gets lower than that, it's bad for it, but it is still INFURIATING to have bought a keyboard explicitly for long battery life and being a bit greener, and done everything you can short of deciding to sit under an INDUSTRIAL GARDEN GROW LAMP ALL DAY and the product doesn't deliver as it says it's supposed to. Update 6/11/2018 - I contacted Logitech for a replacement, and they sent one gladly. It seemed to work great for a while, but after two months it too seems to have broken. The second one is now not charging correctly.

5.0 out of 5 stars
By Charles C. White Jr. - Reviewed in the United States on September 28, 2017
Great wireless solar keyboard-needs rechargeable 2032 version of battery when the battery dies.
Logitech K750 Wireless Solar Keyboard Works well. The battery died after about 2.5 years of use. Although the manufacturer states that the battery is not replaceable, I pulled out the carrier and discovered that the battery was a rechargeable ML2032 lithium button cell. It had a label that warned you not to replace the battery. Well the keyboard is dead without a battery so I went ahead and put a fresh ML2032 in the carrier. The keyboard has worked just fine since replacing the battery (about 1.5 years ago). Today the Mac version of this keyboard died (battery lasted about 3.5 years on the Mac version). Same thing-replace the battery and the keyboard is working again. Photos attached from the replacement of the battery on the Mac version of the keyboard. Photos show the battery carrier partially pulled out from the keyboard, removed from the keyboard, battery removed from carrier-note battery type with label pulled back and Solar App report after battery replaced. Note that a 2032 battery has a nominal capacity of 0.21 WH and could generate some heat if shorted. If you replace with a ML2032 or LIR 2032 you should have no problems. A non-rechargeable CR2032 may be a different matter. Note that Amazon has these batteries for sale. Your local retailer is not likely to have them.

Recent Reviews


1.0 out of 5 stars
By Tiffany - Reviewed in the United States on September 12, 2016
Awesome until it's a complete disaster
First off, I really like the way this keyboard feels, and when it works, it's awesome. Unlike others, I have had no issues with battery life; it's at 98% right now after using it all day today. However, I currently have a K750 which is a replacement for a previous K750 I had, which also eventually had the problem that caused me to replace it with this current one. The problem is that sometimes, the keyboard will just... stop sending keystrokes to the computer. Or it'll delay sending them for a second or two or five. Or it'll double-up on a single keypress. Or triple-up. Or it'll duplicate a series of keystrokes. -- begin demmonstrationin of the problem -- If yoou type a lot, having to constantly go back and edit things youu typed correctly but that the kkeyboard sent iincorrectly to the computer is aggravating beyond all rrecokoning. This lasstt section heere was typed without ccorrecting the wooords after the fact - I've just left the text as the keyboard sent it too the computer (after typing everything carefull y and correctly, though quickly). If your keyboard did thhiss to you, would you give? (that should read 'give it more than one star', but the keyboard didn't transmit the part after 'give' to the computer so I had to retype it here so you'd understand what I was trying to say and that I'm not a complete lunatic) (good times)

1.0 out of 5 stars
By Fly4trade - Reviewed in the United States on February 10, 2017
Logitech, I used to love your products but in this, you have let me down!
If I had written this review two years ago this would have been 5 stars. Great feel, very similar to my Microsoft equivalent and to top it off solar powered. That's where I was wrong! As many others are slowly discovering this is a disposable keyboard, that is to say after 2-3 years its very likely your battery which holds the solar charge dies. That battery is not user replicable so you are left with a useless lump of shiny plastic destined for landfill! This isn’t even touching on the environmental ethics of making such a product which would otherwise last many many years, disposable. Makes good business sense from Logiech’s point of view, but not so much from mine as a consumer. After many weeks of arguing with Logitech and them refusing to replace it or repair it, I tried to change the battery myself. Even if you can find the correct type of battery, the keyboard wont then bind with the computer after replacement. So, in the bin it goes!!! With Logitech's stance on the battery issue, I can in no way recommend this product and I will (partly out of spite, and partly due to poor product design and customer service) not be buying another Logitech keyboard. A keyboard at this price is not a product that should need to be replaced every 2-3 years!!

5.0 out of 5 stars
By buy.A.T.30.C.E.L.L.at.50 - Reviewed in the United States on June 14, 2017
Love it and ready to buy another one (NOT as ...
So I have had the Logitech Wireless Solar Keyboard (the original when it first came out) for almost 6 years now! Bought it back in September 2011, when solar keyboard was quite the novelty (at least in my opinion). Love it and ready to buy another one (NOT as a replacement) for my new office. The original one is still going strong, allowing me to write this review. Now, as much as I love this keyboard, I did have to replace the rechargeable 3V Lithium button cell battery in 2016. The battery at that time cost $6, well worth it considering that it brought life back to my favorite keyboard. This means the original rechargeable button cell battery that came with the keyboard lasted more than 4 years! In summary: Pro: Durable, comfortable, sleek, elegant, and contemporary looking. Con: None *Even the price has come down, bought it for nearly $20 more 6 years ago!Maxell ML2032 Rechargable 3V coin cell lithium motherboard cmos battery

2.0 out of 5 stars
By Myfi - Reviewed in the United States on March 26, 2018
I can't in good faith recommend this keyboard.
You know. A friend of mine has this keyboard! It was WONDERFUL! I loved the heft, the design, its being solar. It's been a month and eleven days. The battery per manufacturer boasting is supposed to last 'three months in utter darkness'. It does not. It's had to be charged twice since I bought it. It stops working when the battery is at 30%. Even with the maximum amount of light it can accept to charge, it takes it THREE. DAYS. to charge back up, WITHOUT BEING USED. Mine won't even charge back up to full! It stops charging at 92% and won't consider going up past that, even when left alone to charge for an additional day solid. I understand it turning off at 30% because if a battery gets lower than that, it's bad for it, but it is still INFURIATING to have bought a keyboard explicitly for long battery life and being a bit greener, and done everything you can short of deciding to sit under an INDUSTRIAL GARDEN GROW LAMP ALL DAY and the product doesn't deliver as it says it's supposed to. Update 6/11/2018 - I contacted Logitech for a replacement, and they sent one gladly. It seemed to work great for a while, but after two months it too seems to have broken. The second one is now not charging correctly.

5.0 out of 5 stars
By Charles C. White Jr. - Reviewed in the United States on September 28, 2017
Great wireless solar keyboard-needs rechargeable 2032 version of battery when the battery dies.
Logitech K750 Wireless Solar Keyboard Works well. The battery died after about 2.5 years of use. Although the manufacturer states that the battery is not replaceable, I pulled out the carrier and discovered that the battery was a rechargeable ML2032 lithium button cell. It had a label that warned you not to replace the battery. Well the keyboard is dead without a battery so I went ahead and put a fresh ML2032 in the carrier. The keyboard has worked just fine since replacing the battery (about 1.5 years ago). Today the Mac version of this keyboard died (battery lasted about 3.5 years on the Mac version). Same thing-replace the battery and the keyboard is working again. Photos attached from the replacement of the battery on the Mac version of the keyboard. Photos show the battery carrier partially pulled out from the keyboard, removed from the keyboard, battery removed from carrier-note battery type with label pulled back and Solar App report after battery replaced. Note that a 2032 battery has a nominal capacity of 0.21 WH and could generate some heat if shorted. If you replace with a ML2032 or LIR 2032 you should have no problems. A non-rechargeable CR2032 may be a different matter. Note that Amazon has these batteries for sale. Your local retailer is not likely to have them.