How is it that all the electronic devices we plug into the wall can have varying voltage and amperage needs but don’t burn out when plugged in?
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Most of these chargeable devices charge using USB nowadays.
USB is not only hardware it comes with mandated protocols implemented in the firmware. These include a way for the device and the charger to negotiate how much current they need to charge up.
Other connectors will either have something similar (thunderbolt) or will have a set voltage/amperage associates with them.
There just aren’t that many configuration for charging. The current used to charge a battery has no real relation to how much the battery outputs when in use.
You can fill your bathtub by opening the tap full or just a little or fill it by the bucket. In the end, you have a full tub and the drain will still drain at the same speed.
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