Ask Lemmy

I grow and sell weed/grass, I don't think that our industry is profitable enough to influence the beef industry.

It's hard because it's not a perfect linear relationship between battery voltage and battery percentage. When the battery is 80% full, the voltage hardly changes at all as it drains. But it can change significantly with unrelated factors, like age and temperature. So they have to use the integral of current consumption to calculate the battery level. There are other tricks, too, like using temperature to check battery percentage (when the battery is charging, it heats up if it's nearly full), and some lithium ion batteries have a third wire for measuring the temperature.

The battery has a capacity reading down to the milivolts and the phone knows how much power it is using, which changes dynamically to meet the usage. The remaining battery level is determined by the voltage available at the current consumption. There is some averaging involved based on your usage profile.

So your battery level is accurate at a given time, but changes based on what you are doing and what you have running. So your battery will drain faster if you are playing an intensive game, but will last far longer if you have nothing unessential running and the screen is in sleep mode.

Apps like Facebook, chew through battery in the background because of how often it has to use resources to check for notifications, when when you don't actually have the app open or in the recent apps list. So your battery will lose charge faster than you would expect when you haven't been on your phone.

so, naw lil bro.