Edit: I've had it plugged into my MBP to charge for about 35 minutes and it still said 80%. After turning it completely off and back on fixed this (now says 100%).
Edit2: I really wish I could play music via bluetooth with this.
(Quoting Wikipedia: »in order to obtain an accurate satellite location from this transmitted message the receiver must demodulate the message from each satellite it includes in its solution for 18 to 30 seconds. In order to collect all the transmitted almanacs the receiver must demodulate the message for 732 to 750 seconds or 12 1/2 minutes.«)
I was really hoping for that when reading through everything it could do. I know it can't do everything but most of the power at that point would be on the headphones right? I'd be surprised if that doesn't show up at some point.