[QUOTE=CliffordK;21238622Camping, and one is either recharging with solar, bicycle generator, or hoping one's battery lasts the trip.[/QUOTE]
Not necessarily. Even state, county and municipal parks often have power outlets. Day use parks may also have outlets to take advantage of when you stop for a break. Same with highway rest areas.
That said, there is no way I would carry a device like that. My Road Morph G works just fine, and I have a light rear light that bolts to a hole on a rear rack bracket. The rechargeable batteries I have for it last for at least two weeks, even with use during the day.