Play a clone of Tetris
Tetris has suggested efficacy in attenuating development or severity of trauma and it seems to have a beneficial ongoing cognitive effect also.
Don’t get Tetris™️, get a good paid version that lets you buy it and doesn’t show ads or track you after buying.
Then you have everything, even the good battery life to don’t make this an issue at all.
(I’m very biased for this handheld, which I use even more than my Switch and PS4).