Water activated light...no more batteries

[kingsleytailors]

Thanks i agree with you

[sanantonioglamour]

I think so right .

[conradelektro]

I just looked at the website http://www.hydralight.net/technology/ , very nice, but how do you shut off the light (battery) after you have tipped it into water.


Once the battery is activated it will run its course. Let's say I need light for one hour and then two months later I need light for another two hours? New light (battery), right?


This is not a game killer, but it limits its use.


Greetings,

[TinselKoala]

No, I don't think that is strictly true. In the versions I know about, the consumable anode is only consumed when current is being drawn from the cell, IIRC. So you can turn it off electrically and let it dry out and then it can be re-activated when needed, as long as there is some anode material left.

The drawback I saw was the buildup of the reaction product, which must be cleaned out and disposed of periodically. This reaction product is generally harmless but I hesitate to think about millions of users all down at the beach cleaning out/activating their Hydralights at the same time.

[profitis]

a marvelous idea.its a current-to-voltage transformer in there somewhere(l.e.d.s need very little i and lots v).at neutral ph the anode wil alkaline over time and increase resistance.at vinegar ph the thing can go for a while