4 ms·

Linus Tech Tips challenge accepted

samstave 4y ago
A good litmus may be: get a phone to a certain level of depletion of batt Get (2) phones' batts to same level. Place each on a charged, but one submerged, one not. Time to 100% ==?? Measure this multiple times/multiple device types Build a table of "underwater charging rating of xFactor..."
- hulitu 4y ago
  "Place each on a charged, but one submerged, one not" Unless the connector is waterproof ( i doubt it) , don't try this at home. Water is a good conductor.
  - spicybright 4y ago
    And make sure to plug it into your bathroom outlet for the fault protection!
    - SketchySeaBeast 4y ago
      Which only makes sense because how else would you test this beside sitting in the bath with a stopwatch?
      - samstave 4y ago
        Try sitting in tub with a toaster?
  - robocat 4y ago
    DC plus water equals electrocorrosion[1] if the pins are in contact with water. USB 5 Volts is easily enough to corrode most electronics - certainly made a huge mess of one phone I owned that got dunked while charging. [1] electrocorrosion isn’t used much as a word, but it should be. Google electrolytic corrosion, direct current corrosion, stray current corrosion. [null] https://knowledge.electrochem.org/encycl/art-c06-cathodic.htm https://knowledge.electrochem.org/encycl/art-c06-cathodic.ht...
    - CuriousCosmic 4y ago
      > electrocorrosion Isn't that just galvanic corrosion?
      - robocat 4y ago
        Galvanic is two dissimilar metals, usually with an electrolyte like wet soil or water. One metal will corrode far faster than the other e.g. zinc sacrificial anode will corrode to protect iron. Corrosion due to electric currents is different. A few Volts in reverse and you could make iron the anode to corrode and protect a zinc cathode (Cathode and Anode depend on current direction, e.g. they swap when charging a battery). Two parts made of the same metal can be can be corroded with an electrolyte between them, with low AC or DC voltage driving differences.
  - Dylan16807 4y ago
    Connector? This is about wireless charging. If you're worried about the wire to the charger itself, I'm sure they've thought of that if the charger is submersible. (Do any of those exist? I'm only finding a splash-resistant one.) And if the charger isn't submersible it'll be outside the bucket and the cable will be fine. I do see some wireless charging waterproof battery banks. No cable needed for that.

A good litmus may be: get a phone to a certain level of depletion of batt Get (2) phones' batts to same level. Place each on a charged, but one submerged, one not. Time to 100% ==?? Measure this multiple times/multiple device types Build a table of "underwater charging rating of xFactor..."

hulitu 4y ago
"Place each on a charged, but one submerged, one not" Unless the connector is waterproof ( i doubt it) , don't try this at home. Water is a good conductor.
- spicybright 4y ago
  And make sure to plug it into your bathroom outlet for the fault protection!
  - SketchySeaBeast 4y ago
    Which only makes sense because how else would you test this beside sitting in the bath with a stopwatch?
    - samstave 4y ago
      Try sitting in tub with a toaster?
- robocat 4y ago
  DC plus water equals electrocorrosion[1] if the pins are in contact with water. USB 5 Volts is easily enough to corrode most electronics - certainly made a huge mess of one phone I owned that got dunked while charging. [1] electrocorrosion isn’t used much as a word, but it should be. Google electrolytic corrosion, direct current corrosion, stray current corrosion. [null] https://knowledge.electrochem.org/encycl/art-c06-cathodic.htm https://knowledge.electrochem.org/encycl/art-c06-cathodic.ht...
  - CuriousCosmic 4y ago
    > electrocorrosion Isn't that just galvanic corrosion?
    - robocat 4y ago
      Galvanic is two dissimilar metals, usually with an electrolyte like wet soil or water. One metal will corrode far faster than the other e.g. zinc sacrificial anode will corrode to protect iron. Corrosion due to electric currents is different. A few Volts in reverse and you could make iron the anode to corrode and protect a zinc cathode (Cathode and Anode depend on current direction, e.g. they swap when charging a battery). Two parts made of the same metal can be can be corroded with an electrolyte between them, with low AC or DC voltage driving differences.
- Dylan16807 4y ago
  Connector? This is about wireless charging. If you're worried about the wire to the charger itself, I'm sure they've thought of that if the charger is submersible. (Do any of those exist? I'm only finding a splash-resistant one.) And if the charger isn't submersible it'll be outside the bucket and the cable will be fine. I do see some wireless charging waterproof battery banks. No cable needed for that.