Even though I think people don't recommend charing them in the DSD since they are smaller cells, I've had no problems so far (but I monitor it the whole time). And they don't seem to get hot.
I took the pennies I was using, and soldered them together. I have 2 stacks, one for 14500, and then put them both together for 10440. Becareful that it doesn't touch the side terminals and short out the charger. Put them on the other end and use heatshrink or tape on them.