You have a convert. I'm looking at the 13w HID, plus a water bottle Li-ion battery and with either this mount or this one. But the problem comes with the switch, cable and battery case. Which leaves me with 4 questions:

1. Can you get a switch that can deal with heavy rain that also tells me when the battery is low?
2. What cable would I need to connect the battery to the switch to the light?
3. If I wanted to change to a 4000mah battery (maybe 2, one as a backup), where do I find battery covers?
4. What am I missing?

Thanks for all of your help.