KD (kaidomain): Deals and new products thread

I have a C8.2 here that i’m reviewing , it still runs great after 5 full runs on max setting (5* 45 mins) , without a fan etc .

I had the same thing happen to one of my XHP50.2, but I also have two still working fine : one in a Thorfire C8s with a H1-A driver and a Jaxman M2 with a LD-3 driver driven @ 6A.

Been looking at this light thinking about getting one.Would appreciate your opinion on it.

Hi delete

Please let me know more about the flashlight problem.

All the flashlights before we shipped out has been done a full battery testing.

I would like to see what is the matter and see how to improve it.

Thank you

Ban

Roughly 30% of the input power leaves as light, but this doesn’t mean the reflector is heated significantly. The reflector might absorb 10% of the light, so all together maybe 3% of the power is heating the reflector.

The pill has a very good fit , i don’t think this is the problem…

Seriously? For every flashlight before shipping it out you need to run it on high mode for about 40 mins?

Hi

Yes, for the KDLITKER flashlight, it will turn on the Hi-mode and run for at least 30 mins until the low voltage warning appear (Light is flashing).

Thank you

Ban

It’s awful. You have to enter text the exact way it appears in the product title in order to get anything to show up.

Thank for your advice.

We will keep improving on our system.

If you get any error or not functioning well, please let me know.

Thank you

Ban

That’s impressive testing. Good to know.

This is not uncommon actually. Most lights work this way and many only touch the lens at the end and the led centering disc at the mcpcb

Hi friends

2 new CREE XP-L HD in stock

Cree XP-L HD W2 1B White 6000K - 6500K LED Emitter

Cree XP-L HD W2 2B White 5700K - 6200K LED Emitter

Thank you

Ban

Ordered ! thanks Ban !

Ha :smiley:

Thank you for your ordering.

Hi BanL

Will it be possible to make this driver with a 17mm board?
http://www.kaidomain.com/p/S026606.H1-A-20mm-3A-1-cell-5-Mode-Boost-Driver-Circuit-Board-for-Cree-XHP50-6V-MT-G2-MK-R2

Im trying to get more info on this driver - http://www.kaidomain.com/p/S024906.FX7-17mm-2_8V-4_8V-3A-5-Mode-LED-Driver-Circuit-Board-(1-pc)

Hoping someone has used this driver and would be able to give us first hand information.

Current: Max. 3A

Lo : 300mA @ 4.6V
Med : 1200mA @ 4.6V
Hi : 2900mA @ 4.6V

- Interesting why amp rating is measured at 4.6V.

  • Is it possible to do a resistor mod?

Presume a worst case scenario. Most useful input voltage value to make an output measurement is, in my opinion, the smaller voltage at which it still can maintain regulation. With an XM-L2 at the output most 7135 linear based drivers will maintain regulation at least down to 3.7V, and if PWM frequency is too high the voltage figure for mid and low modes will be even higher. Of course this is not based in 7135 regulators, but I said that to put this into perspective. That driver may not be able to stay regulated within an usual loaded li-ion voltage range (3 to 4V). This is how I believe we should teach these fellow testers how should they proceed. Thus, to answer your question:

Current is measured at 4.6V because the driver is a PoS and cannot stay in regulation below that voltage. Done.

Cheers ^:)

I sort of get what you are saying Barkuti, and thank you for the explanation.

It is supposed to be a regulated driver and yet it will struggle to do just that at the typical voltage range of a li ion battery.

Not exactly that, glide 1. That thing sort of pissed me off a little bit, I find it misleading. For a linear driver like that, I'd prefer to see the figures for ≈3.7V (or the minimum input voltage at which it keeps regulation -specifying the driven emitter-) and maybe somewhat below to see how it evolves.

This is not to say that 4.6V figure is not useful, it may be a useful figure for those aiming to use 4S Ni-MH input at the driver. Even in such a case, I'd complain because I always want to see worst case scenario figures, which for 4S Ni-MH would be below 4V.

Accepting those figures would be like accepting Ben Johnson's Olympic 100 Meter final record in Seoul, 1988. Sort of.