Are there any other battery/charging bands/straps out there other than the Reserve Strap (which should have started shipping last week)? Now that RunKeeper runs native on the watch, it destroys my battery life when I go on long hikes. Watch was 100% charged when I started yesterday. By the time I got done with a 12 mile hike it was down to 4%. When the app was just a companion to the iPhone app it was much, much better on the watch battery. But I like being able to just look down at my wrist at how long/far we've been going, without pulling out my phone. So I'm looking into options for giving me extra battery life or charging on the go. The only thing I came across was the Reserve Strap, which is $250. The old pre-orders should have started shipping, which means if I ordered now I probably won't see it for months. Is there anything else out there yet?