I know this is kind of uncharted territory and that it has been guessed on a couple of times, but do you think it's safe to say that the SF U2 will be running on a Li-Ion battery (Pila or such) in regulation, and with a runtime acording to the capacity of the battery, on the highest level (100 lumens)? Also can we confirm that the Pila 168A (dia. 19 mm.) fits in there?
Jan
Jan