I wear a Pulsar solar. The face is a solar panel (but you cannot tell by looking). It is a very sensitive solar mechanism because it will keep charged and running in the dimmest of room light. The back of the watch proclaims: "no battery change required." I have had it for nine years, it has never stopped, never been wound, and since it doesn't have one, never had a battery replaced. It is water proof and the case and band are titanium, so although it is heavily built, it is quite light on the wrist. In every way, it is an almost "perfect" watch, but strangely enough when I go out into the woods I generally carry a Russian pocket watch that my daughter bought me about 10 years ago. I just love a good pocket watch and I love a mechanical movement. Its all so 19th century, wheels, levers, cogs, springs, etc. Probably a lot of Bushies are Luddites at heart!