I don’t think you understand parallel vs series when it come to amperage in batteries.
Let’s say the flashlight runs at 12v (I’m pretty sure it does since the battery pack runs at this voltage). There are 8 cells in the battery pack wired 4S2P. So 4 in series and then these 4 are wired together in parallel with the other 4 in series.
With 100 amps total, each group of 4 cells handles 50A.
Each of the 4 cells in series is running at 50A in order to produce the 12v.
If you look at things from the point of view as wattage, the light is producing maybe 1200 watts (200A@6v, 400A@3v, 100A@12v all equal 1200 watts). 1200 watts divided by 8 is 150 watts per battery. Each battery is 3v (I’m using 3v, 6v, 12v to keep things simple. Actual voltage will be 4.2v, 8.4v and 16.8v) So if each cell produces 150 watts and it’s 3v, Ohms Law (wattage = volts x amps) says the cell has to produce 50 amps.
I hope this makes sense.
(Keep in mind that I’m just estimating the light needs about 1200 watts to produce 100,000 lumen from 18 x 70.2 with maybe 20% losses out the front. I don’t have actual measurements from the light.)
DX80 run 16V from battery pack but the 8 leds wired in 4S 2P and 6V soldering (12V soldering is more difficult with a lot leds on theMCPCB because need more traces) so the led board needed 24V. According to this it has a boost driver to not use huge wires to MCPCB. I don’t know more just speculating that maybe MS18 also have several leds in series to lower current and use smaller gauge wires and a boost driver. The battery pack fully charged is 16.8V in MS18 and R90TS. That is a fact.
The r90ts doesnt look that good now. It simply has more lumens over the r90c, the same throw and by the looks alot less runtime.
It reads turbo 60s which must be step down time as even high runtime is short and they have 8 cells. Really dont think its worth it if without more throw.1700m isnt much, the blf gt4 sounds like it will beat it by far with good sustained lumens.
Compared with Acebeam X70, MS18 has twice as much lumens output, here’re some pics from my friend Dabo.
ms18:
x70:
temperature test with ms18 when it in steady state:
Thanks for posting the graphs Pearldriver. It’s hard to imagine the MS18 is more than twice as bright as the X70. That would mean it is making over 100k peak lumens. However, it seems like the sustained load is about 14k lumens. Was hoping for 20k lumens sustained.
It looks like the sustained on the MS18 roughly matches the sustained on the X70. Sustained on the MS18 was 647 and sustained on the X70 was halfway between 400 and 800, leaning a little closer to the 800 side in the beginning. While it’s not 20,000, I’m hoping it means the sustained is closer to 18,000 like the X70 is advertised.
That doesn’t appear to be measuring lumens. It seems to be measuring lux which can vary based on the beam angle from the reflector (wide, narrow, etc…)
We need more info on what is measured and how the measurements were done. Ideally you need a large integrating sphere to take the beam angles out of the equation.
