Bests & Worsts Reviews from Amazon

This product is an example of what happens when you marry an incompetent engineer with a shady marketeer, and give them access to surplus capacity of a cheap Chinese factory. There is NO WAY this light will survive past 10 meters (on a regular basis). How can they print "50 meters" with a straight face? Others have complained that the light goes off in the middle of the dive. This is a result of the pressure differential (in/out) while submerged. At the surface the pressure inside and outside the housing will be the same. As you descend the pressure on the outside increases and depresses and holds the button, turning the light off. And, you won't be able to turn it back on until you resurface. This is why all "real" dive lights use a rotating switch. Or, maybe it went off because it flooded and shorted the circuit... more on that next. If pressure on the push button was the only flaw with the design, they could have simply used a stronger spring to overcome the outer pressure... but that's not the only problem. This thing is destine to leak. The highr outside pressure (up to 5 bar) wants to equalize with the lower inside pressure (1 bar) and there are 4 points of entry. 1. Front lens. silicone seal, very likely to hold to 50 meters. 2. Charge port cover. silicone seal, very likely to hold to 50 meters, if attention is given while replacing and tightening. I would recommend using some sort of lubricant. 3. Switch button. loose o-ring (not compressed around shaft or in housing) very likely to leak in less than 50 meters. Probably will leak in anything over 3 meters, over multiple dives. 4. Thin film over the LED holes. Unknown resistance to pressure because it is glued in place, probably will hold to 50 meters. But, that completely depends on the saturation/coverage of the glue. I will reassemble the case without the internals and pressure test it for leaks to see if I can identify the weakest point. My money is on the switch button o-ring. The main board is designed for 96 LEDs and the battery is an 18650 - 2500mAh