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Cell Phones that work underwater
From experience if you have a mobile phone on you when you have a drysuit on then the pressure and depth from most recreational dives doesn't really affect them.
Of course, you can't answer the things and at most depths the mobile signal is poked because it doesn't penetrate very deep into the water.
Oh and if you are wearing a semi-dry or a wetsuit, seawater results in a 'rooted' (kiwi technical term) phone. After exposure to seawater they pretty much are non-operational in a few days.
What I would like is a device that irons my cotton business shirts in 5 seconds without hassle and with all the creases in the right places.
Now that would be useful.
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