Carbon: The only watch that can charge your smartphone

How many charges? How much energy to charge one phone? How many milliwatt hours can it hold per a charge? This seems massively inefficient. I might have to wave my hand constantly in circles for it to work properly.

Really appreciate the look at Carbon and the candid feedback! Okay so here are some responses... Helen - We could make Carbon smaller but then we would have to drop the battery capacity used to charge your smartphone. And that wouldn't be good. We actually used some popular watches to help size Carbon but they were mostly watches designed for men... It's a bit tricky balancing wearable energy with form and fashion. More work to do... Ryan - So our media coverage is over the top? That's only half of it! Alright we'll tone it down. BTW, your medium size wrist will do just fine for Carbon. Kris - It's difficult to choose...Slate v. Coal and then the watch face color! The good news is that you have plenty of time to decide. Kumar - 500 charging cycles and about 800 mAh depending on final design. No need to wave your hand... Carbon will work just fine not moving at all. Please let me know if you have more tech questions. Thanks for the discussion everyone!!