A Car Battery Level Indicator that plugs in your cigar lighter socket

What it does

When inserted in the cigar lighter socket, it signals the electrical system’s voltage level by means of a bi-color LED. Especially in the cold season, knowing the battery voltage, when the engine is off, allows us to prevent unpleasant inconveniences, such as a failed engine start; in fact the voltage really makes a statement on the accumulator’s conditions, that is to say, on its remaining charge and on the cabability it still has to charge and supply the starting current required by the engines for the start, especially if they are diesel ones (that notoriously require a greater power from the starter, because of the greater compression ratio: from 15:1 of the modern turbodiesel ones to…from open-electronics.org

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