I’m accustomed to the imperial system. But agree that metric is better.

Some metric stuff I have no trouble with. I have a good spatial sense of the distance of a mm, m, and km. And can do a rough miles to km (and vice versa) conversion in my head. I have a good sense of how much a kg is and similarly can do a rough conversion to and from lbs in my head. But while I understand that a gram is 1/1000 of a kg, if handed a small object and asked to guess how many grams it is, I’d fail miserably.

Celsius I can’t ever remember the conversion, but I’ve had enough exposure to it that I understand if it means cold/cool/warm/hot weather.

I have a PC that I use as a router. It’s power setup is inverter > lifepo4 battery > battery charger. Relevance here is that it’s a “dumb” setup insofar as the PC can’t manage the battery.

What I did to help with battery health is figured out how long the battery should run the PC and have a scheduled disconnect of the mains power for about half that time once a day. Not as good a solution as something that can maintain a ~80% charge, but better than leaving it at 100%

It’d work for an old laptop too, and can be accomplished with a cheap aquarium light timer.