200 hours of standby time and up to 9 hours of talk time, that’s what you can expect from this headset in the dark. The solar panel on the side, yeah, that should increase those numbers a respectable amount in the sun light. Its 14 grams, which is pretty light, and as far as BT headsets go, its not too terribly unattractive, which is surprising, considering adding solar panels generally makes whatever they’ve been added to quite hideous. Its kind of sad we had to wait this long for such an obvious solar power upgrade, I mean sure, on cell phones, not much sense, they are usually in your pocket, but headsets, generally on your head, in direct sunlight, of course if you don't have a too long hair.