On Friday, March 10, 2017 at 7:52:30 PM UTC-5, Joerg wrote:
Snipped
With or without dynamo I'll never ride without a battery because then
it's lights out when waiting at an intersection. Very bad at night.

Now, about the bicycle air conditioner ... :-)

--
Regards, Joerg

http://www.analogconsultants.com/

Most decent dynamo ights these days have a standlight that'll run for several minutes when the bicycle is stopped.

Cheers