Originally Posted by
cyccommute
What's more convenient than that? Not needing to charging them for the ride home. If you need to charge them, you have to remember to charge them. I charge all of my lights at home at the end of the ride so that I have fresh batteries for the next ride. I'd rather not include having to charge them at the half way point as well. I doubt many people would find it convenient either.
This makes total sense for anyone who has a reason not to charge in the day. Remembering can be hard, for me and lots of other people. It's easy for some people, and other things are more important to them than charging frequency.