This is Barry. Long time no see, how are you guys!
We are currently developing a high-performance flashlight featuring 3–4 LHP73b LEDs as its primary light source, delivering a maximum output of approximately 18,000 to 20,000 lumens. It also incorporates side-mounted, high-CRI neutral white light and a 660nm red light, and is powered by a 32700 battery. The base is equipped with a threaded mount, allowing for attachment to accessories such as straight stands.
Please feel free to speak your mind and share your views!!
Amazing news! Great tint, great performance, and great price. Finally, a Sofirn light I’m actually excited about again.
I’d vote for a warmer CCT, like 3000K or 4000K, since the main emitters will be cooler white (5000K?). Warm white would make it much more pleasant for “lantern” use.
Please keep both smooth and stepped ramping options in the UI. Some recent Sofirn/Wurkkos models only have smooth ramping, which is worse in my opinion. The advantage of stepped ramping is more predictable runtime (which is crucial for “lantern” use).
Please include a powerbank feature with such a large battery.
I’ve checked the 32700 - their capacity is around 6000mAh, which is the same as the modern high capacity 21700 cells.
Why are you considering this uncommon size, what is the advantage? LiFePO4?
Advantage of 21700 would be that we can swap the empty cell for a fresh one (and more compact body). With 32700 it’s not possible, because almost no one has an external charger for LiFePO (3,2V) or for Li-ions this size.
1.: Why 32700? Just because Olight uses this? Not a big fan, as they are rare, don’t have much advantage in capacity over 21700 and if it’s not really high discharge rated, it will be a bad choice for the light.
As the light is 56mm wide, I’d prefer to widen the lower body a bit (and maybe make it a bit longer) to use 3x21700 or even better a 46950. 46950 might be the best option in terms of space to capacity and brings really high discharge capabilities.
18-2000 Lumen will need 60A upwards!
The side light would be a great addition and making it high CRI would be amazing. Same for a 660nm red.
The driver for this thing will make the difference between a really great light and one that’s only good for selling big numbers on amazon. For 3-4 LHP73b a boost driver would be a good option if those are in series or in case of 4 2S2P. Also a buck driver would be possible. Both definitly need a battery that can provide the current. But without a really good sustain, I’d say 2000lm is minimum, this might not get very popular. Looking at the efficiency of the LEDs, that should be possible, maybe even more.
CCT - please don’t only go for the biggest number - even 5700K is so much nicer than 6500K and nearly no hit in output! 5000K would be even better.
For the side light, I’d say 4500-5000K would be the sweet spot for me if it’s somewhat bright. If it’s max is below 200 Lumen, a bit warmer is fine, too. But with high CRI i wouldn’t go too warm as long as you don’t have a mood light only in mind.
5.UI The switch assembly looks like the same from the ST2. That should provide a good UI - but please make a stepped UI at least an option! With such a great range, I would highly prefer to somewhat know where I am and what the runtime could be!
Appreciate it very much that you take our feedback and hope this comes out great!
I think that 1x or 3x21700 battery is better solution or it is also better to go with 46950 battery.
32700 is not popular format, I think that if You want LiFePO4 battery chemistry, only 32140 battery has enought capacity and is wide available.
Please consider using 4x21700 and quad LMP NV1010, 100A buck+FET(optional) driver and 65W dual way type-c charging with the port cover that will not pop open on turbo mode or if the pressure is barely higher than outside. Also a stainless steel bezel would be great.
Actually, numerous domestic manufacturers in China have been specializing in the production of full tab batteries.
Currently, a 32650 (32700) battery model available on Goofish features a rated capacity of 10Ah,
supporting a continuous full discharge at 60A without triggering 80℃ protection.
Its direct driving performance is estimated to be comparable to that of the 26105 battery and marginally superior to TP 50xg,or sth like that.
There‘s also another model with a capacity of 8000 mAh, supporting 10C unrestricted continuous discharge without temperature cut-off.
If that battery is used and lives up to the specifications, it would be at least better than Olights cells. If those standard 32700 cells with 7000mAh and abysmal discharge rating are used, they would be driven way over the specifications. That was the case before in the IF30, therefore I’d prefer a battery format in which high drain cells are widely available.
Having a couple of LHP73b LED flashlights, they are power hogs. 32700 isn’t going to push the wanted current. 46950-46120’s are, and you’re going to have to use a boost driver to cover the resistance. With a potential draw of 90 amps, 46xxx will deliver. Without really saying it, it’s going to need to be a fairly large light to handle the heat.
32700 isn’t a great choice unless you’re getting some special ones from China thst the rest of consumers don’t or can’t get. 46950 qouls be better for not much size difference. If you’re driving those leds at roughly what the Convoy M21K does, that’s like 60+ amps. I like the side light idea like the Olight Maurader 2 uses.
Why such an odd battery that isn’t easily available? 46950 is a beast and seems more available but unfortunately expensive. 21700 is everywhere but harder to compete against all the other manufacturers. 26650 seems like a more reasonable niche.
