That is excellent, but I use a Lezyne Road Caddy saddle bag.
I think I’m going to have to go off the seatpost. I’m currently using the Lezyne Strip Drive, which has good power and run time, but it’s a little bulky. I’m considering the Stick Drive, but the run time is pitiful at 3hrs.
What is the ultimate rear light for winter road bikes? Small, powerful, neat interface with the bike.