How waterproofing works (and fails)

In case you are wondering, the screen went black around 0:05 because the HDMI cable was bending too much, not because of water. Also at 1:59 what happened is tha the phone simply dimmed its screen. You can see that it's still on if you look closer and I didn't notice it at the time because it worked fine after :) Get Nebula using my link for 40% off an annual subscription: go.nebula.tv/techaltar

The internal water sensors in phones (designed to be checked so they don't have to cover warranty) can be triggered in high humidity environments, like a tropical location (eg. Singapore). The reason for this is that humidity can get through the speaker gaps. This means a phone without water damage can be rejected from warranty just because of those sensors. You have to fight to get them to check the entire phone.

The most mindblowing thing I learned from this video was that there are divers that live under water for WEEKS living in little tubes and breathing bespoke gas mixtures? WTF, that's just crazy.

This episode of Technology Connections is kinda weird

08:40 if anybody is wondering what that japanese text, under the red circle, means: エドウイン which is katakana for Edwin. I am pretty sure this refers to EDWIN, a Japanese clothing brand founded in 1969. Very nice.

You missed the chance to show Samsung Xcover 6 Pro which has a removable back cover with IP68 water and dust resistance. Now people will be mislead by the companies claiming that the only way to achieve IP rating is by sealing everything. But the rest of the video is damn good.

13:58 Titanic was not designed to go to that depth either 💀

"This watch is specifically made so that it would survive going down to the wreck of the Titanic in the way that the now infamous Titan submersible was not." — woke up that day and chose violence

distiled water don't remain non-condutive for long after you've contaiminated it (i.e: putting your dirty phone into it), that phone will die sooner or later

I am under the water. Please help me. Water noises

For watches, people have been doing their own DIY hydro mod for ages. The most popular model used have been Casio watches and some have even survived past 2~3k m depth inside pressure chambers

Just a small correction: Water is indeed conductive. It's true, that water is a very poor conductor, but it definitely can conduct electricity. Every chemist knows, that pH 7 means, that there are 10^-7 mol/L H3O+ ions and 10^-7 mol/L OH- ions in water - it's called the autoprotolysis of water - and since there are ions, water is indeed a (very weak) conductor and can therefore destroy electronics by shorting electrical connections. Saltwater has a lot more ions and is therefore much more conductive and can easily destroy electronics. The pressure component you mentioned, just means that the water has an easier way of entereing the phone. And once inside, salt water quickly shorts any connection it can "find".

There's also the problem where Apple puts the 20V line next to cpu contacts so it ends up being able to kill your laptop even with mild moisture, dump water on it and you can just wave it goodbye.

Something that actually accelerates corrosion is electrical charge. Back in the day of removable batteries the best thing you could do to limit corrosion was to take the battery out immediately. As batteries became permanent, the need for water proofing increased significantly

This video after yesterday’s LTT video is why I love the internet, pretty neat coincidence, nice! Great video as always

I found this a lot more interesting than I thought I would. Great video!

Watercooling: you are doing it wrong

Here is what I do because I run several computers(Motherboards) in a moist basement : I wash them fully with WD40 & then liquid detergent. I repeat this again is the motherboard is old, so that corrosion is removed properly. Then dry them fully for couple of days. They I spray them with one thick layer of WD40 and put them to work immediately. The other remedy is to use dissolved grease in turpentine oil which when dried will allow the grease to remain covering all the components. This will last longer than WD40. I have done this to more than 12+ systems/network switches and some of them work 24/7.

What I found really nice on cheaper phones is that they have resin on the tiny surface mount devices on the motherboard. Those tiny components are protected from water using a resin barrier in addition to a gasket around the Type C port and headphone jack. My spare phone doesn't even have an IP rating but it has survived contact with water plenty of times.

For the first time in a while, this coverage is actually useful.