Windows laptops generally get trashy battery life, and if this going to tank it further, I’d just run Linux full-time on my family laptop and call it a day.
The only reason we had windows was my wife’s comfortability and sometimes zoom glitches out on linux.
Samsung A9+ goes on sale for about $150 every once in a while.
Kids FireHD tablets are generally lower than that. There’s not really any difference between the adult and kids version tbh.