Imalent MS18 with 100,000Lumen and R90TS with 36,000Lumen

Battery packs are 4s2p, 35a cells will be plenty.

If the leds need 200 amps at 6v, that is 50A per cell.

It looks like the 40T data sheet says it can do 45A continous, but only up to 80°C. So short duration 45A is okay.

Maybe the 40T is fine since max turbo on this light is pretty short and the cells should not overheat in that short period.

Are they not running these LEDs at 12v? If they are running at 6v that is some pretty heavy buck at play considering the battery packs are 16.8v

I actually said that the 35A+ required by the light at full power are not good for the cell at all.

30Ts would’ve been quite a bit better.

Also, I doubt it’s using a buck. Starting with the MS12, 10k+ lumens go out the window in terms of regulation.

They are basically running in direct drive.

I don’t know how they are running them. I used 6v as an example.

200A@6v
400A@3v
100A@12

The batteries see the same 50A each.

If the LEDs are run at 12v, then they only need half the amperage vs. if they are run at 6v. So at 12v, it would only draw 25a per cell

https://m4dm4x.com/wp-content/uploads/2019/05/4-1.jpg

That image says 40T for the R90TS. I assume the MS18 uses the same?

the battery pack is the same afaik

If you go to Banggood,you see that Imalent sells a two head,(MS18+R90TS,plus one battery pack),combo.

MS12 ran at 12v I am sure the 18 will run at 12.

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.)

Total power consumption of the light determines individual battery amperage. This is independent of battery configuration.

Oh I see. Thanks for the clarification, very well explained and much appreciated.

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.

Just sayin :wink:

Are these shipping to customers yet?

shipping from factory to the shops to be forwarded to the customers

Have they already left the factory?

i was told they ship after wednesday this week

they did extensive testing and raised the QC a lot

Hopefully they ship and get to the US before the 25% duties kicks in. It would be terrible.

Unless of course they send it as gift $5 like they always do with all other flashlights.