I'm similar to you, I've started out as a PC gamer, and even got a gaming PC built, but I've found myself leaning more and more towards mobile gaming with my S10+.
The displays on phones have improved so much, I just feel like it's a hassle to wait for your computer to turn on.
Battery is only an issue when I'm gaming away for a long time, which isn't something I do a lot, but I would have just invested into a power bank or battery phone case. Most of my mobile gaming is done sitting on my bed where I can charge my phone while playing.
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