I understand that an electric supply can be a higher voltage (120v, or 240v, etc.) and within those voltages be a different Amperage (15A, 20A, 50A, etc.).
But none of this is “smart” or doing anything special besides supplying an amount of power or amperage that is available by the connection.
I also understand that a battery needs line voltage (AC current) to be changed to DC to work. So I get that there is a converter (rectifier?) to do this.
So where/what is the “smart” part?
Can a charger really make my phone or car charge faster than the available electrical supply?
Can a charger really make my phone or car charge faster than a different charger in the same electrical supply?
In: 7
The key thing about electronic devices is that the actual charger is in the phone or the laptop, or whatever.
The thing you plug into the wall doesn’t actually do the charging, it just converts the voltage from wall voltage (which is usually too high for electronics) to a lower voltage which is more suitable.
The charger in your phone contains a small computer which knows how fast the charger can charge and how much power it needs. When you plug the phone into the wall adaptor, the phone checks the capability of the wall adaptor and makes sure that it is powerful enough and whether it can supply the correct voltage. If it is, then the phone will ask the adaptor for a specific voltage, and it will then charge at the best possible speed.
The big problem is that different phones and adaptors speak different languages when they try and agree on the best voltage and charging speed to use. This is why some phones won’t fast charge with some “chargers”, but will with others.
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