I have a couple of these things. Battery life is pretty crappy. The stock code barely worked and had about 12 hours of battery life (if you didn't do anything

I have a couple of these things. Battery life is pretty crappy. The stock code barely worked and had about 12 hours of battery life (if you didn't do anything with it.) I mean... give credit where credit is due though... it's an amazing buy if you're hip to debugging other people's code. I eventually filled in some of the bits that weren't finished and eventually figured out settings so it's not completely sucking down power, so it would last about 6 hours with "moderate" use. I would be surprised if the current code isn't MUCH better, but it's power budget is going to be much closer to an Apple or Samsung smart-watch and not an 80s era ultra-low-power m851. If you're hip to experimentation (like I am) it's a fun little project and worth the money. If you're looking for something to compete with an iWatch, you're going to be disappointed.