Linux Gaming

I'm contemplating to replace 1-2 aging desktops in our home by "gaming" laptops.

What really bugs me with the Linux laptops I currently have is that sleep is unstable or inefficient. On one device it sometimes just won't wake up. On both the battery is drained fully within few days. I have a MacBook at work and know I'll probably not hit the same level of stability and efficiency in sleep, but I'm wondering whether hardware choice can play a role in improving the experience, especially seeing how I might make this my primary device moving forward.

I often grab the Linux laptop and end up going for the work MacBook or my ipad because the battery is dead and I only wanted to check something real quick - it's okay with an old leftover device but it sort of irritates me.

Update: I also experience battery drain when shut down and would love to reduce that. A laptop is a device I keep ready but not necessarily plugged in. As a parent I might not use it for a few days here or there.