Dag, Ebay is blocked at work!! GRRrrrrrrrr...
I didn't know there was a difference.. Just like the Keygos M12, sometimes it is refered to as M12a, and sometimes just plain M12. As far as I know, there are not TWO M12s?
Same with the Keygos M10, I think!!!.. Is there a DIFFERENCE??
Is it better to operate it with 3x18650 or with 1x26650?
It won't take 3x18650 in it. A 26650 usually gives the runtime of two regular 18650s, but still, I don't think this light supports the voltage of two liion cells. A dual cell, properly driven light with an efficient buck circuit may have an advantage with 2x 3100mAh Panasonic 18650s.
My bad, I thought it was either 1x26650 or 3x18650. Now I saw that it takes 1x18650... 
taz, I am a newbie, so bear with my answer. The Keygos M10 will only accept ONE 18650 or ONE 26650!!
My 2 Keygos M10s arrived today. Ordered them from Go_Market on Ebay on 4/1/12. They arrived on the 16th. IMO, pretty fast.. Also they were wrapped pretty good too. Each light was bubblewrapped in a box. Then the two boxes were wrapped double with bubblewrap.
I fired them up with Keygos 26650s just in my house they beamed good. Waiting for tonight to see them in the dark. However, I won't get any pictures because I misplaced my charger for my Nikon!! My bikeroom looks like the amityville horrow too, so finding the charger will be like pulling eyeteeth..
I got this shot off with no flash before my Nikon died..
The light looks good, no nicks, or marks. Just a handsome light. Going to mount them on a bike too. 
Can't wait to see it mounted and some beamshots comparison to KE-5. :)
I hope you find your Nikon charger soon. ;)
Viktor
Find that charger, ce! I want to see those suckers on a bike. 
(Look good on the bubble wrap at least)
I just went for a walk with the wife. I gave here an ultrafire c8, at least I think that what it was. I had the M10. Pointing down to the grown, she claimed, and it seemed the ultrafire was brighter. But, low and behold when we reached a dark area, and she shined the uf and you can see about 100 yds down, then I shined the M10.. Wow!! As hard headed as my wife can be, and stubborn, she even said "yours is brighter". I went with it about 25 minutes with it all on high. It did get warm.. Not uncomfortable, but it was just warm..I got some trustfire 26650s coming too. Thinking about taking tomorrow and clean my room up..
Now, I got a pair of these M10s. With just that little outing, I am on the verge of getting a 3rd one for helmet use.. At that price... ;) Might just take my camera battery up to Best Buy about a mile from here, and tell them to stick in on the charger for me. I purchased my camera from them.. Will see..
Is there any difference between C8 and M10 reflector?
Congrats on your twin Keygos cehowardGS. I hope you get as much use and enjoyment out of them that I have. I'm still really liking this light and use it daily.
Same seller has an M10 and an M10a model, any difference?
They looked good mounted on my 88 Centurion Ironman Expert. I left the house real early for work, 5:15 am, so I could be all darkness. 
I was pushing two torches on my helmet, and the two awesome M10s up front. Oh My Gawd!! When I got to traffic, cars were slowing down big time. I have the M10s pointed to about 25 to 35 feet out front and downward too.
Even pedestrains getting ready to cross in front of me, stop with a jolt!! Also, I am using the Keygos 26650 cells. I was riding for about 45 minutes, lights on high, not even a blink. Still strong. It looks like, I can get a good 90 minutes on high with these cells..
I am going to look for that charger today..
Dam, I am a happy camper!!
Biggie, it looks like this is going to be my favorite.. A full run this morning for about 45 minutes, and they didn't even blink. You know I had the two M12s, but the zoom function didn't seem to work well on the bicycles. The M10 is a perfect fit. just the right amount of flood/beam, and the size too. Dam great light..
And I only paid $23 each, that is the sweet part of being a Budgeteer!!
LOL you are putting me in a dilemma, between this one and the Fandyfire/UltraFire HD2010...
"I was pushing two torches on my helmet, and the two awesome M10s up front. Oh My Gawd!! When I got to traffic, cars were slowing down big time. I have the M10s pointed to about 25 to 35 feet out front and downward too.
Even pedestrains getting ready to cross in front of me, stop with a jolt!! 
Also, I am using the Keygos 26650 cells. I was riding for about 45 minutes, lights on high, not even a blink. Still strong. It looks like, I can get a good 90 minutes on high with these cells..
I am going to look for that charger today.. 
Dam, I am a happy camper!! "
I will PAY to see a picture of you lit up like Tron... :D
Well, let me add a little more to your dilemma!!
I got this coming too, should be here any day now, and it seems to be another winner, in price too..
I have been so happy with the light, I haven't looked. Will look at them tonight. If I have camera going, will takes some shots..
Oh great!!! 
Started looking at 18650 lights (C8's & C10's), now I am looking at 26650 ones and the choices keep adding!!! Nevermind the Beamtech BT-4000 I saw somewhere else in here... Hope you will do some outdoor beamshots of your new toys once you have the time!!!
I got the BeamTech 4000 coming too!! In fact, the BeamTech 4000 came the other day, before the Keygos M10s. However, it worked for a little bit and then stopped. I got it from Tmart, they are on this board. I contacted customer service, and they QUICKLY sent me a mailer to send it back. Gotta say Tmart's customer service on a scale of 1 to 10, with 10 being the best, they get a 25!!! Anyway, I should have the Beamtech back in about 3 or 4 days. From the little bit I saw of the BeamTech 4000, I don't think it is a bright as the M10. Now, I could be wrong, I will wait until I get it back to do a comparison..BTW, got the BeamTech 4000 from Tmart for $37.75 free shipping, and they in NJ, so I got it in 3 days..
Ha, your next post is going to be "I went and got all 3"...