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22 Posts

10-29-2017

United States of America

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  • Message 51 of 66

Re:Lenovo c940 - Charging via USB-C?

2020-03-06, 16:34 PM
@Zoltanthegypsy You wrote "Generally, using a higher wattage Lenovo slim-tip charger is not a problem. The laptop only draws what it needs." Does this mean that using for example a usb-c Lenovo 130W charger for ThinkPad would not charge a C940 14 faster than its native 65W charger? On my side I can say, I've tried the charger of the new ice lake Spectre. It's also 65W and it also outputs 3.25 at 20V. I didn't notice any difference with the stock charger regarding to speed. But I'll choose that one because it's noticeably smaller, thinner and lighter, and I travel a lot. And I mean, really nomadic travels, with big backpack and all what you need for 4 seasons. It's also way more beautiful as a charger. Another mod said, using not stock chargers can void the warranty. Could you please articulate that? Thanks
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3 Posts

01-23-2020

United States of America

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  • Message 52 of 66

Re:Lenovo c940 - Charging via USB-C?

2020-03-10, 9:16 AM

Hi,

 

I've exactly the same setup and can confirm your experience ( Yoga sometimes crashed, doen't react while dock was pluged in, etc.). Now, after fw update, it works so far .... but I can't charge the YOGA using the rear TB3 port via dock (foremost works - little oringe light shines). Unfortunately I can't remember whether it was possible before firmware update.  Does it works in you setup?

 

Best 

cliss

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1 Posts

03-14-2020

United States of America

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  • Message 53 of 66

Re:Lenovo c940 - Charging via USB-C?

2020-03-14, 19:06 PM

I have a Yoga C940-14IIL Laptop (ideapad) - Type 81Q9 Model which charges fine with the power adapter provided.   In order to provide a second charger I had purchased an Anker PowerPort Speed PD 60 and a Anker Powerline II USB C to USB C 2.0 Cable (6ft) USB-IF Certified.  This combination does not work directly with my laptop.  However, after reviewing this thread, especially the comments about the charger cable combination I decided to tray a couple of combinations to see if any work.  The additional equipment I had to work with included:

  • A Belkin USB-C Multimedia Hub (5-20V 3A)
  • A USB-C charger and cable I got with a Red Hydrogen One phone, 5V/9V/12V 3A/2A/1.5A
  • A Lenovo ThinkPad TBT cable 40G P/N SC10M59509 that came with my work Lenovo ThinkPad Doc
  • A generics USB-C Cable that came a Plugable USB-C DisplayLink dock  

 

The following combinations worked:

  • The above Anker PowerPort connect through the Belkin with all of the 4 cable options
  • The Red USB-C charger that came with all of the 4 cable options 

 

Clearly there is something with direct interaction from the PowerPort Speed PD 60. 

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1 Posts

05-20-2020

United States of America

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  • Message 54 of 66

Re:Lenovo c940 - Charging via USB-C?

2020-05-20, 14:46 PM

I just received my 15 inch Yoga 4k and I'm pretty disappointed that the laptop won't charge over USB C. I am running a docking station that is intended to power higher powered devices (certified for Macbook Pro 16 inch) and now I have to run a second cable to the laptop to power it? I would think that any premium laptop in 2019/2020 should offer charging over USB C given the nature of single cable connected docs. Hopefully this is something that will get fixed from a firmware update.

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2 Posts

06-10-2020

United States of America

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  • Message 55 of 66

Re:Lenovo c940 - Charging via USB-C?

2020-06-10, 18:58 PM

Add me to the list of disappointed customers.   I bought a 15 inch 940 last month and it's a PITA to charge.   The brick is massive and heavy.  I've even tried to buy a spare so I could at least leave one at my desk but they've been out of stock for weeks.  Sheesh.  

 

I love having the screen real estate but I already had a rude awakening when I struggled to find a snap-on case.   No, I don't want a bag or a sleeve, I want something to protect it when I'm carrying it and using it all around the house and office.  But that's digressing, and I've pretty much gotten over it.  Charging, however, shouldn't be a struggle.

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139 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

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  • Message 56 of 66

Re:Lenovo c940 - Charging via USB-C?

2020-06-10, 19:13 PM
If the 14" has the same battery and can be charged by USB then why can't the 15"?
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2 Posts

06-10-2020

United States of America

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  • Message 57 of 66

Re:Lenovo c940 - Charging via USB-C?

2020-06-10, 22:40 PM

Color me extra-confused now.  I was just on chat with Lenovo customer service, as I need a spare power supply for my 15 inch C940.  The rep insisted that I could use the USB-C 65W adapter.  I told her mine came with a 135W, questioned it multiple times, but she was adamant that it worked and that I should buy one.  

 

I'm not sure what to do at this point.  I really need a spare charger, but the 135W are out of stock indefinitely.  

 

Thoughts?  Advice?

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41 Posts

02-21-2020

Switzerland

41 Signins

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  • Message 58 of 66

Re:Lenovo c940 - Charging via USB-C?

2020-06-11, 7:58 AM
I recommend you get the 230W or the 170W charger instead. Works perfectly. Lenovo agents will advise against this power supply (they are scared of liability charges) but at the same time they explicitly advertise the 230 W charger as compatible with ALL devices using their Lenovo Slim Plugs on their site.
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139 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

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  • Message 59 of 66

Re:Lenovo c940 - Charging via USB-C?

2020-06-11, 8:57 AM

Lenovo are a disaster of a company. How they are still in business amazes me ........

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1 Posts

08-09-2020

United States of America

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  • Message 60 of 66

Re:Lenovo c940 - Charging via USB-C?

2020-08-09, 20:22 PM
Add me to list of disappointed customers who just found out their c940 - 15 inch cannot charge via USB-C. I consider this a critical feature while traveling. I have tested the Lenovo USB-C 65W adapter (from my parent's c740) that a customer service rep suggested to PhoebeB above and it DOES NOT WORK. LENOVO, IF YOU'RE LISTENING, IS THERE ANY WAY TO TURN THIS FEATURE ON FOR SLOW CHARGING?
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