Stu wrote: ↑
Fri Jul 07, 2017 7:20 am
Comparing electric to water is not the same! A smaller wire would still supply 12v!
A smaller wire can carry less current, just like a smaller diameter pipe can flow less water. We aren't talking about voltage here, my water analogy is talking about current draw, which is measured in amps.
It's a perfectly fair analogy to use to simplify the law of conversion of energy in an electrical circuit.
If the circuitry is generating heat as Joeman suggests
and like your phone charger is generating heat and noise, than that circuit is leaking energy, just the same as the valve in my analogy is dripping water.
Still nobody's provided evidence that these things do generate heat. I'm not saying it isn't, but when you look on forums everywhere and half the people say it does draw current and half the people say it doesn't, somebody needs to provide some evidence otherwise the thread has no value.
A simple test would be get a multimeter in line with one of these things and see if a current can be measured. If you can't measure it in mA then there isn't enough draw to drain a battery. If it can be measured the debate is over.