I had a power bank sitting next to a tap, and my friend asked me to get it away from water, as the water could enter the power bank and potentially “burn” the insides of it. This got me into thinking how does water ruin circuits when the machine is not running at that moment.
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Water tends to be conductive (if it’s not deionized water). That means if it gets into a circuit, it can electrically connect components that were not meant to connect; a short circuit. If you say, connect the positive and negative lead of the battery, it will discharge as fast as possible, leading to uncontrolled overheating. Or it could connect across a microchip, and send 5V to something only meant to see 3.3V, which then fries the microchip. That’s why the ‘treatment’ for watered-electronics is to turn it off, remove the batteries, and then to dry it completely.
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