I moved my batteries from the rear rack to one of the water bottle cages. Having the batteries mounted on the rack made the bike "back-heavy" and ackward when carrying it up and down the stairs at work.
For now I have the batteries secured in a tennis ball can in the bottle cage. No pictures yet. The tennis ball can is the same diameter as a water bottle and is waterproof.



Does anyone know of a "straight" (no narrow neck) water bottle or similar waterproof container that I could use instead of the tennis ball can?