Eli5: How are phones waterproof even though the charging port terminals can be exposed to water and not short circuit them?

Question

Eli5: How are phones waterproof even though the charging port terminals can be exposed to water and not short circuit them?

In: 4320

Answer 1

Charging terminals are a power *input*, not a power *output*. There can be a dead short across them and it’s not a big deal. Water resistant phones can also detect abnormal current leakage between contacts when you plug something in to charge the device, and it will let you know the port is wet. Hit it with some canned “air” and blow the water out, and it will continue to work just fine.