..newby Aussie...

Welcome to the LPF!

1. Use search. Many questions have been answered already. If you do not succeed with search - do not hesitate to ask - great and experienced community is here. Also make your thread in Welcome section to introduce yourself - you may even ask there to get right directions.

2. Sorry, I do not have experience with this products from DX. So I let this point to someone else to answer.

You can also go through FAQs.

Enjoy your time here.

CyanNinja - An 18650 battery should be fine, it will probably take 5 volts or so without any damage, it depends on what type of regulator and heat sinking they are using. I very much doubt it would have 200mW output - it's probably a 30mW module.