Ultrafire DV-S9 diving light?

[kramer5150]

@Jerommel

@texas shooter

I would stay away from diving with this light or any other that runs current though the body.

On ships they place aluminum or magnesium plates on the hull to corrode before the steel hull does. Run a current from tail to head and your light will dissolve away.

I doubt that’s because of electrical current.
The shell is (usually) negative and there’s no positive outside, so there’s no current through the water surrounding the body.

Those pics are from a 2012 thread. The damage you see is from galvanic corrosion and electrolysis when this light is submerged in salt water. Basically it forms a cathode / anode and the salt water is the electrolytic solution. It only happens when this light is turned OFF (IIRC) though because the electrical circuit when turned on becomes the current path of least resistance. The condition is worsened for spots where the anodize is scratched off or etched off. Thread here… skip ahead to page 5-7. IIRC a couple different members were complaining about the same thing.

NEW TrustFire TR-DF003 2x26650 3xCREE XM-L Diving Light

Looks like CNQ has a new 2×26650 for sale. I was going to grab it until I saw the price. I may have to think about it, but it comes with the good batteries and a charger and tail rotating switch. I’ve all but given up trying to get a good Skyray 856, so this one may be the one. TR-DF003 Looks like CNQ has a new 2×26650 for sale. I was going to grab it until I saw the price. I may have to think about it, but it comes with the good batteries and a charger and tail rotating switch. I’ve all b…

See post 178 and 191….