Basically the title.
How do devices measure the amount of energy stored in them? What do they measure to say that I have 87% battery left?
In: 3
Every electrical device has a upper and lower limit in terms of voltage where it can correctly operate. For example your RC car might be designed to use a 12v battery(the battery is at 12v when fully charged), but if for example the battery drops to 8v because of use the car it will not be able to run due to lack of power. In this example you have 4v of power you can “use” which corresponds to a percentage. Batteries can track consumption non-linearly which means 10v might not be 50% but instead 15%.
Note: The current(amps) of a battery doesn’t change because it measures the quantity of electrons in the battery. If will not change unless electricity is being routed the wrong way to the ground instead back to the battery.
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