On Sun, 6 May 2018 10:50:45 -0700 (PDT), "
wrote:

Why not just duct tape a flashlight to your bars. Then you can stop
at any convenience store and buy some new D batteries and ride forever.

Bungee cord works better than (duct) tape:
http://www.learnbydestroying.com/jeffl/pics/bicycles/slides/bicycle-flashlight.html
Patent pending.

D cells are not the best choice. Modifying a D cell Maglite
flashlight to handle LiIon cells works better:
https://docs.google.com/spreadsheets/d/1TgxJkcEDsB5KaoWo_u13b-3Ke-Lmlp5DVOxE38d8L5E/edit#gid=0
2nd best are D-cell adapters for AA NiMH cells:
https://www.google.com/search?q=aa+to+d+adapter&tbm=isch

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558