I just got a new Specialized Roubaix Expert with SRAM parts. I discovered that lengthy car rides drain the batteries because the derailleurs are triggered into activity by motion.
Solution? Take the batteries off for long travel. Check.
The problem is, the place where the batteries seat in the derailleurs has two tiny spring-loaded prongs that could get fouled with road dust, oil, and other contaminants—or worse, snapped off by some misadventure—over long rides on an outside bike rack.
A perfect solution to this would be a plastic or nylon "dummy" battery that could just be snapped into place for the ride. Does anybody know of such a solution? I suppose plastic wrap and rubber bands could work, but geez, what a Red Green kind of fix that would be!
PLEASE NOTE: I'm not looking for replacement batteries or any standard item. I've been all over the Web and checked out SRAM and other websites for a solution, to no avail.
I went to a bike shop (not where I bought the bike) and, thanks to Gary's and Nanobis's enlightening me as to the name of this item, I was able to ask for precisely what I needed: a battery block for the SRAM AXS derailleurs. Not only that, but they just gave them to me. No charge. Life is good.