English Community

ThinkPad NotebooksThinkPad: S Series, ThinkPad Yoga and Twist Laptops
All Forum Topics
Options

3 Posts

12-20-2017

FR

2 Signins

36 Page Views

  • Posts: 3
  • Registered: ‎12-20-2017
  • Location: FR
  • Views: 36
  • Message 1 of 2

thinkpad yoga 370 - poor performance when charging via USB-C

2017-12-20, 23:17 PM

Hello, I am experiencing a problem with my yoga 370

 

When plugged to lenovo docking station on usb-C, it work fine

 

however, when pluged to an USB-C power adapter (45W), or an external battery (USB-C - 45W as well), il says it is charging, however :

 - it is not (or very slowly)

 - I am experiencing significant performance drop (laptop using only 10% of CPU power , opening windows setting menu takes more than 10 seconds !)

 

I just cannot understand why this is happening, USB-C is supposed to be pretty standard, isn't it ?

 

AND I found that :

 - lenovo chargers are clunky, having a smaller USB-C (apple like) one would be much better 

 - having a spare battery is a must for long flights, ...

 

Any ways to solve this issues

 

I seems, according to the link below that this is a bios issue

any comment on this ?

https://forums.lenovo.com/t5/ThinkPad-S-Series-ThinkPad-Yoga/ThinkPad-Yoga-460-Big-loss-of-performance-while-charging-amp/m-p/3366993/highlight/false#M14267

 

thanks a lot

Reply
Options

10398 Posts

01-02-2010

US

39215 Signins

404932 Page Views

  • Posts: 10398
  • Registered: ‎01-02-2010
  • Location: US
  • Views: 404932
  • Message 2 of 2

Re: thinkpad yoga 370 - poor performance when charging via USB-C

2017-12-21, 20:17 PM

USB-C is not very well standardized when it comes to power input.  The chargers and computers negotiate the required voltages and capacities using a complicated interchange.  The chargers are supposed to be able to provide 5V, 9V, 15V or 20V and up  to 100 watts, but all that is negotiated.  Most non-Lenovo chargers don't implement the negotiating standards or don't supply enough capacity.


Rich


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save