Am I missing something?
Whats the big deal about not being able to take 18650 cells?
SureFire lights can't take 18650 cells either...
Which is why Surefire lights are in a very small minority in my collection.
I consider CR123 exclusive-use lights like the Surefires to be emergency lights only for when I can't recharge the rechargeables.
For that reason, the Surefires sit in a drawer unused for the most part unless the house power goes down.
My best scenario is to buy lights that are optimized best for use with 18650's, but can also use CR123's during power out situations.
But to answer the question with regard to the MA6...
Considering how large the MA6 is, it doesn't make sense that it can only use the smaller capacity 17670. With the A8 being 155mm long and the MA6 being 149mm long, what's the point of making the MA6 at all?
The MA6 isn't even 1/4" shorter than the A8, it uses a head that still makes it too big to pocket carry, and it uses the smaller battery.
That makes no sense to me at all. Once a person compares the specs of the MA6 to the A8 or A9, I would think one of the two (A8,A9) would make a more sensible choice considering how much more performance you get from a light that's less than 1/4" longer.
Even if the 17650 battery works fine for runtime in the MA6, I personally like to standardize the batteries I use, and I have chosen the high capacity 18650 as the best choice for long runtimes in the lights that use it.
What was the point of making a light that uses an 1800mah battery when for a miniscule addition in bore diameter, it could have been made to use the 18650's which can be had up to 2600mah?
Trust me, I'm not knocking the Tiablo company because I have their A9s light and I have still not found another light as well made in it's class.
The build and finish quality of the A9s is superb, and I hope the company continues to do well and introduce new products while supporting it's existing products with upgrades.
It's just that I don't what they had in mind with the MA6. It's simply a light that didn't have to be made. They could have offered the A8 and/or A9 with a smaller (pocketable) head, put a clip on it, and had a light that made more sense.
Hope that helps answer the question.