Car Charger
why does the car charger that came with my cell phone put out 12 volts?
I baught a car charger for an env, which takes about 5v and battery puts out 3.7v. i just measured the voltage out of the car charger and its 12v. this charger was specificly made for my phone. can someone explain why this doesnt cause issues?
Because when you're measuring the voltage out you're measuring an effective open circuit voltage. The charger is current limited, not voltage limited. When you plug your phone in, the load of the phone and the current limit sets the voltage to the correct value.
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