@seldor, I would advise putting silicone grease in the threads. This will help a lot, since you can make it airtight with it.
How much current does it take on turbo? Couldn’t find it fast in thread. I have beed trying light with Sanyo GA and Sony VTC5A and no noticable difference in beam.
This light uses a boost driver so the output should be regulated.
It will not go into Turbo once the battery voltage has dropped to a certain point.
The GA has more voltage sag under load compared to the VTC5A, so it will not have as much total Turbo run time. If you want the most total run time on Turbo, use unprotected high drain cells.
On Turbo, it can draw at least 8A per battery.
I know, I test many cells, 8 per cell, than it is 16A all current on turbo?
VTC5A are one one of strongest 18650, but GA have more capacity when on lower modes.
Because the batteries are 2S2P, if you use 4 batteries, it is 16A at 6v.
If you use 2 batteries it will try to draw 16A from each one.
If I use 2 batteries 2s1p it will still take 16A as it is overall current drain I assume? You make it less clear with this explanation. I asked if overall current drain is 16A? It is clear, that if you say 8A/cell than it should be 16A/2p.
I don’t know the specific design of this boost driver. Plus it went through at least one revision. Maukka tested an early version of it using 4 x 30Q fully charged and it drew 16A. He had to use a special test rig to get this measurement. This is why you don’t see anyone else measure it. I don’t even think anyone has tested the newer driver design. So I don’t have much info to go by.
Depending on how the Boost driver is designed, the amperage may go up as the voltage drops. So it could possibly draw 18A to 20A as the batteries drain (which would be 10A each battery).
I really don’t know what the amperage would be using 2 batteries only. It depends on the type of battery and it’s state of charge. I will just say that each cell will draw at least 16A, assuming it turns on Turbo at all.
It is best to always use 4 cells in this light.
Use high drain for more total run time on Turbo.
Use high capacity for more run time at medium to low levels.
8A is a little bit too much for GA, but on the other side, it will go down before they get hot. I am not going to use 2 cells, only wanted to determine total current to know which cells are ok for this light. Maybe when I have some time I will check current on lipo or power supply. Anyone has idea of highest voltage driver can use?
I can only guess and say 8.4v to be on the safe side.
Keep in mind that using 8.4v from a power supply will not show an accurate amperage because a batteries voltage will sag under load. Maybe 7.8v will show a more accurate amperage (simulating 4 x 30Q under an 8A load per cell).
I would be curious if the amperage goes up as you lower the voltage. There is a chance the amperage will stay the same and the brightness will decrease instead.
Interested in Nichia
I just noticed that post #1 says input goes up to 9v.
At the same time, I notice Banggood says:
Uh, who knows. :weary:
If anyone ever sees this light sold as a host, let me know.