I saw a nice review for Solarforce when I was looking for a better alternative to Nitecore. I'll get one sometime. I don't think there's there's much difference in the best 16340 cells, not that they're that great.
$3.50 each + $2 shipping. Using my Thunder AC680 hobby charger, their capacity is around 720 mAh at the industry standard .2C (used .2A) when discharged down to 3 volts from a full charge. They are the highest capacity 16340’s I could find and they are cheap. The only downside is that they are pretty wide, so they will not fit in all lights.
I am discharge testing my Trustfire 880 mAh 16340’s I got from Tmart as I type this. I will post the results in here once it is done.
Edit: 702 mAh on the Trustfire’s from Tmart. I am genuinely suprised by that. I thought they were going to be in the 500 mAh range…
My favorite 16340 is a 18350. Seriously, most of my flashlights are Solarforce L2’s which will take an 18350 as a replacement for the 16340. So I use Xtar IMR 18350 850 mAh which are really great. But I recently bought a couple of Trustfire L2M’s and to my surprise their walls are not bored for an 18 size battery so I had to pull out some 16’s. I have some Xtar protected cell 16340 600 mAh which also world great. But in with the Trustfire L2M’s they included a small charger and an Ultrafire protected 1000 mAh. I’ve read these Ultrafire’s don’t do well over time so I have been charging them then using them to about 3.6v and then another recharge. So far I have done 4 recycles in 2 days. I’ll do a few more and see if they start to deteriorate. I’m surprised that these Ultrafire 1000’s hold any charge at all but so far they have been good.