I'll definetley let ya know as soon as I try it out. I'll need to cycle the LiOn batts a few times and I may need to buy a regulated switch as I think the cygolite's regulator is built into their battery and of course this batt pack has a PCB but no Hi output reg.
The folks at trail tech that make the light setups that batteryspace.com sells do offer the soft start/regulated switch I just have to call them tomorrow and find out how much $$$$
I should still end up with a very good deal on the HID though as I paid about 180 for it from performance with all of their coupons and then I think I'll sell the batt/charger on ebay for 50(hopefully) then add the 74 that this cost and that puts me at just a twitch over 200 for a high capacity LiOn HID light set up... if it all works LOL :-)
Doug