How cold is it? My phone goes down like 10% at school in Uk winter

About 18C if it gets any colder heating goes on.

Idk. My heatings similar, so it could be something else

I'd say that's not normal. I'll turn my lite off when fully charged and it'll be pretty much at 100% when I turn it on a week later. I think the lowest it got was 97% but that was about 2 weeks in-between useage.

Luckily the battery drain during use is pretty normal I estimate about 3hours. So that’s between 3-7 hours as advertised. I checked the serial on my switch and it’s new, says 2022.

The battery life does vary depending on what games you play. I find that divinity original sin 2 properly destroys my battery life 🤣😭but other games are generally a bit better.

Edit: how do you check the age/date of manufacture from the serial number?

It’s says 2022 left of the serial number on my switch.

I never knew that 🤣👍

I don’t know if that’s the case with all switch lites though.