This driver:
http://www.intl-outdoor.com/boostbuck-318v-triple-xml-circuit-board-p-542.html
http://www.kaidomain.com/product/details.S020121
Seems to be really cool. Has anyone used it and can report about how good/bad it works?
Hi Nightcrawl,
I used the IOS driver in my Torchlite build with an MT-G2 sitting in front of it. Works great and love it.
How many cells? How many amps?^^
The following shows using the same light, IOS 5a driver, same batteries but with two different LED’s. The beam shots can be viewed here: NOW 70% OFF COUPON!! DIY TorchLite 2x26650 XM-L, SST-90, SST-50 etc Host!
2 × 26650 Trustfire cells 4.19v, MT-G2 5000k, IOS 5A driver 3.24a at tailcap HIGH mode
2 × 26650 Trustfire cells 4.19v, XM-L2, IOS 5A driver, 2.24a tailcap HIGH mode
Looking good.. can you measure tailcap current with one 26650 on the MT-G2 light?
I want to use this driver in a single cell light to power 3-4 LEDs..
Heres a link where I used the KD driver in a JM05. For some reason awhile ago it decided to stop working. I think something melted and shorted running at 5 amps. From memory it was a waste running an XM-L U2 at 5 amps as there was no difference in light output to med which was 4 amps. Got hot quick though at 5 amps.
Hey Night, it was difficult to get the reading having to reach down into the battery tube for proper contact, but it appeared to level off at 4.20a using 1 x 26650 Trustfire cell. It’s possible the reading could be slightly higher. But this should give you a very good idea if it’ll be appropriate for your project.
Doesnt sound too bad, thank you very much for your effort! :)
Has anyone used it to power 3 LEDs in series from 1 LiIon cell?
Nightcrawl, I will be using it to repair a 3 x T6 Skyray 856 2 x 26650 flashlight next week. I’m sure I’ll be able to test it using 1 x 26650 and post the numbers for you.
Awesome, you are my hero! :P
Hi Nightcrawl,
I repaired my Skyray 856 3x T6 light with the IOS 5a driver. On 2 x 26650 MNKE IMR26650 cells, I get 3.40a at the tailcap.
On 1 cell, that number increased to 4.20a. Hope this helps.
UPDATE: Using 2x Trustfire 26650 5000mAh cells tail cap readings were 3.45a and steadily increased.
On 1 Trustfire 26650, I got a steady 4.25a.
Hope this helps.
Thank you! Efficiency might be interesting, but I guess not very good. At 100% efficiency your numbers would give about 1.7A to each LED.
It there is anything else I can do for you, please don’t hesitate to ask 
sorry for bumping 
I would like to buy this driver but need to know its’ efficiency first.
Richie086, according to your info on the other post
quote: “With the XM-L2, tail cap measurements were 2.24a on high mode.”
I just tried to calculate the efficiency @ xm-l2, correct me if I wrong.
Output to led: 5A
LED nominal vf: 3.24v (accord. to datasheet ?)
Power to LED= 5A*3.24V = 16.2W
Output to driver: 4.19V*2 = 8.38V @ 2.24A
Power to driver = 18.77W
~Efficiency = 16.2/18.77=~86%
Is that right 
?
Hi HiTiT,
Sorry for the delay responding. As far as I know, when I got my 2.24a on High mode with my XML-2, since the Torchlite is a 2x 26650 light, I assume you double the 2.24a which is 4.48a to the LED before any inefficiencies.