This is not a flashlight review. Maybe I’ll do a review later, but youtube already has a good video review not from me.
I ordered Convoy H2 with LH351D 5000K. It came with a small issue - the bezel of the reflector is installed with misalignment towards the button. It means poor or even no water tightness at bezel thread. The reason was found quickly - the bezel is only screwed in at 2-3 turns because of the reflector. Reflector is too high (or long, whatever is more appropriate in this case) and does not allow to screw in deeper, so the sealing ring under bezel does not even touch the head. By the way, the videos in youtube I saw about H2 (only 2 at the moment actually) - I noticed the same bezel position. Looks like it is general fault at H2 and hope they will fix it. But for existing units they sell, you can fix yourself easily with sandpaper.
If you look at the front - misalignment is to this side.
You better see it from the top.
And here’s how bezel is screwed in without reflector - much deeper and sealing ring touches the head.
Same view from another side - no any misalignment.
Taking the bezel out and looking inside. You can see sufficient amount of thermal compound.
Since I disassembled it, decided to change the thermal compound to my trusted one. Running ahead I can say that heating became faster and hotter, means better thermal exchange.
Now we take sandpaper (I had #240), flat surface and start to grind to about this red line (1-1,5 mm, zoom the photo in). Be careful and don’t grind unequally (keep at 90 degrees to surface). I made sandpaper wet, otherwise reflector turns hot. IMPORTANT! Don’t grind too much! Otherwise bezel will screw in deep to the end, but the sealing ring glass-bezel will not be pressed and sealed. And by the way, the copper base plate has no screws and is pressed to head by reflector.
Now wash, assemble all back and see result - bezel is screwed in deep and equally, sealing ring is pressed to head. The only soft spot left for water tightness is charging port, if it important. But it can be sealed too, if necessary, and you’ll get a good IPX8 or so.
Briefly about flashlight: good light, gread Samsung LED, convenient modes. I like that it is kind of thrower, not floody as with TIR lens. Type-C charger - perfect type if you need built-in charger.
Cons: size and weight, but I don’t care.