[nitrostarter]

Honestly, I make sure that there's no possible way for the leads to touch and short out. If its bare leads, I tape them up individually and then tape them to the pack. Then just package them in nicely.

I use priority flat rate boxes for just about everything. 2-3 days there and they always do fine. I'm sure linc will chime in here, he's shipping a ton of Lipo's around.