Originally Posted by RainmanP
>The battery will continue to reside in a small handlebar bag.
>... probably wind up spending extra money,
Wow! My hardware store said that that condensation would eventually wreck the battery. Is your bag vented? He sold me a small sub-panel box and waterproof switch etc. But the box is too bulky Maybe a waterproof bowl will work. You're on the right track. Making your own is better, you may spend extra but get what you want.
-Virginia