cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
lenovotv
HDMI
Posts: 289
Registered: ‎05-24-2018
Location: US
Views: 1,783
Message 1 of 9

Some questions about Yoga 920 UHD vs. FHD versions

Hello, I have watched some reviews and came up with the following questions. Could you please let me know the following?

 

1. It is advertised that the UHD version has a battery life of about 10-12 hours. Some reviewers mentioned that in practice, the battery life is half even doing light work. So, what is the "real" battery life in practice?

 

2. One reviewer mentioned that the UHD version could be turned to display in resolutions of FHD through windows without lost of clarity. Is that really true? If I switch to FHD mode, how many additional hours of battery life will I get? Will the text and images still clear? I would like to have the option of 4K when needed and when I want to save battery power, switch to FHD mode on the fly.

 

3. If I buy the UHD version and connect it to a 4K monitor/TV, will the internal graphics chips be able to handle 4K in both the LCD and the external monitor? I need a laptop to be able to drive external TV at 4K @ 60Hz with Chroma 4:4:4.

 

4. A reviewer mentioned that although there are two Thunderbolt 3 ports, they are actually shared. In other words, one cannot use a port to drive an external 4K display at 60Hz and at the same time charge the laptop using another port. Please clarify.

 

5. Can I use 3rd party external charger to charge this laptop rather than just the adapter which came with the machine?

 

Thanks.

Community Moderator
Community Moderator
Posts: 1,401
Registered: ‎12-13-2016
Location: US
Views: 1,771
Message 2 of 9

Re: Some questions about Yoga 920 UHD vs. FHD versions

I have the FHD 920, 4K 910. So, I can't answer all of your questions.

 

1. Real-world use for me is about 5-7 hours. I can push it beyond that doing word processing in Airplane Mode with a dim screen. I can suck it dry in 4 hours doing video processing while running a virus scan and surfing the web.

 

2. I can only speak for my 910. I have to actually look at the settings to tell if it's doing 2160 or 1080.

 

4. Yes, you can use one port to charge and the other to run an external display.

 

5. Yes, but it might depend on the charger. Needs to be a USB-C charger that'll do 45W@20V minimum. And not all of those work as they should. Seems manufacturers test them with a Macbook and nothing else. Read the reviews before buying anything. I have two Lenovo chargers (obviously), an HP and a super-slim off-brand. The off-brand will charge the 920, but not the 910 when it's running.


____________________________________
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. I love beer.
lenovotv
HDMI
Posts: 289
Registered: ‎05-24-2018
Location: US
Views: 1,768
Message 3 of 9

Re: Some questions about Yoga 920 UHD vs. FHD versions

Thanks for sharing your experience. 

 

1. Are you talking about FHD 920 or 4K 910?

2. Do you see improvement in battery life when switched to 1080? If so, by how much?

Community Moderator
Community Moderator
Posts: 1,401
Registered: ‎12-13-2016
Location: US
Views: 1,750
Message 4 of 9

Re: Some questions about Yoga 920 UHD vs. FHD versions

1. The 920. Though the 910 performed about the same when it was new. It's about 2 years old now.   

 

2. I notice no difference. That said, I haven't gone to the trouble to do any scientific testing. To do it properly, I'd need the same video running on the same settings (only changing resolution) in Airplane Mode until the battery died. While I DO have a good 4k test loop available and might do that sometime, I haven't so far. THIS, however, is on my 910.


____________________________________
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. I love beer.
lenovotv
HDMI
Posts: 289
Registered: ‎05-24-2018
Location: US
Views: 1,745
Message 5 of 9

Re: Some questions about Yoga 920 UHD vs. FHD versions

If it is only 5-7 hours, that may be too short for me. I would prefer something of about 10-12 hours.
Community Moderator
Community Moderator
Posts: 1,401
Registered: ‎12-13-2016
Location: US
Views: 1,743
Message 6 of 9

Re: Some questions about Yoga 920 UHD vs. FHD versions

You might want to drop back to the FHD, then. PCMag did the same sort of testing I was talking about and got 22 hours out of the battery. Nothing they tested did better.  Food for thought. 


____________________________________
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. I love beer.
sjfwhite
Fanfold Paper
Posts: 2
Registered: ‎02-25-2018
Location: CA
Views: 1,715
Message 7 of 9

Re: Some questions about Yoga 920 UHD vs. FHD versions

You can also set the display for 1080p for when you are on battery and that will help your battery life.

Jeffla
Punch Card
Posts: 25
Registered: ‎10-30-2017
Location: US
Views: 1,709
Message 8 of 9

Re: Some questions about Yoga 920 UHD vs. FHD versions

How does setting a 4k screen to 1080p save battery life? The screen is still 4k and still has all the pixels a 4k screen has. All 4k pixels need to be illuminated, managed and utilized. 

 

I question is genuine . I have a 1080p screen. If I change the resolution to 640x480, how does my battery life improve?

 

Nevermind, I found the answer. 

 

The GPU has fewer pixels to generate and therefor  uses less power. There are still 4k pixels, but it mirrors more and has fewer to draw. That saves power. This is interesting to me, but good to know. 

 

lenovotv
HDMI
Posts: 289
Registered: ‎05-24-2018
Location: US
Views: 1,688
Message 9 of 9

Re: Some questions about Yoga 920 UHD vs. FHD versions

How many hours/minutes can one gain by switching from UHD to FHD?

Check out current deals!


Shop current deals

Top Kudoed Authors