this post was submitted on 16 Jun 2023
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Jack and charger ports can be controlled by the phone to turn off if there is low resistance (ie water) between contacts.
A battery is harder, as it's what provides the power to the thing that decides whether to turn off the port. Not that it's impossible to put some smarts into a battery, to decide when to power the output. But it's going to add a lot of complexity and bulk to do it (switching circuit, logic circuits, etc)