Illum
Flashaholic
The WA 1111 with 2x18650 in mdocod's holder is a very good combination. You get more run-time, and it's easier on the cells. The only downside is the WA 1111 is $9, vs. the WA 1185 at $5.
I don't know what charger you are using for your 17670s, but the 18650s will be fine in that. The charge time will just be a little longer.
I'm using the DSD charger from Lighthound. While it states "18650" as part of their compatibility its quite a snug fit both linearly and horizontally for 2x17670s...I'm not sure how a 2x18560 could possibly fit.
WA1111 draws 3.6 amps...my goodness, it makes me wonder why Surefire designed the MN21 to draw 5 amps...:candle:
the comparison looks good:wave: