3 ms·
Liquid Crystal Thermometer
- hammock 4y agoSee also https://electronics.stackexchange.com/questions/306028/duracell-powercheck-how-does-it-work#:~:text=According%20to%20the%20German%20Duracell,or%20red%20in%20your%20case https://electronics.stackexchange.com/questions/306028/durac....