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

CAT (as in CATEPILLAR) Work phones do it very simply. They have a rubber hatch over the USB and 3.5mm jack that you close when you’re not recharging the phone or using the jack.