Originally Posted by
Team Fab
I have had the local battery specialty store make battery packs for my riding lights, why have racers not had similar done for race day battery packs. Also, could you build a solar charger that was less weight and use an even smaller battery?
I'm sure you could do this, but you'd have to check the charge generated vs. weight trade off. Solar panels are certainly getting better / lighter - you could probably get something that mounted over the top of panniers or a rack (but would you have a rack if you were worried about weight)?
Then some circuitry to feed the generated electricity to the battery - on a sunny enough day you might be able to get away with a ridiculously light battery.
Di2 battery weight is 70 g, so that's not much to begin with.
Also, thanks all for the replies to my question. This isn't an issue with our current tandem ('80 peugeot), just a consideration for the future.