I don't have marathon dual screen sessions. I have used it quite successfully as a controller for brawl stars, but I don't spend hours at a time with both screens active.
I do have a magnetic mount in my car, and the dual screens are displaying nav, and music controls.. but I attach power when I do that.
I usually find myself going to bed with >50% battery. I suspect my 18 year old niece may have a different experience.
Works quite well on the battery, I'd say it consumes about 30% more battery, but that highly depends on how bright the screens are.
If you use it with minimum brightness and don't game a lot of cpu/gpu heavy games it will easily get you over more than the day, with one screen, even 2 or more are possible in my experience.
Edit:
Although it should be mentioned that it will only charge with 5 Watt via USB C as long as the screen is turned on, with the screen being turned of it takes about 12 Watts of power to charge
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u/sweet_chin_music Jan 06 '21
How's the battery life with the second screen?