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On such an article it would not go down to 1Hz. It's checking if the image is changing or not.

Which would make me want the refresh rate to be user-configurable. I would not mind at all if the 1 Hz refresh rate caused parts of the page I don't care about, such as animated ads to stutter and become unwatchable. If given the choice between stuttering ads but longer battery life, or smoothly-animated ads with shorter battery life, I'd choose the unwatchable ads every time.

Ideally, I would be able to bind a keyboard shortcut to the refresh-rate switch, so that the software doesn't have to figure out that now I'm on Youtube so I actually want the higher refresh rate, but now I'm on a mostly-text page so I want the refresh rate to go back down to 1 Hz. If I can control that with a simple Fn+F11 combination or something, that would be the ideal situation.

Not that any laptop manufacturers are likely to see this comment... but you never know.

I assume this will just be using Window's dynamic refresh rate feature, which you can turn on and off in the display settings, and when it's off you can set the refresh rate manually. I guess the question is whether they will let you set it as low as 1hz manually though.

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