This is what they were able to build. Rev 2. (probably when they get to mass producing it) will have better battery life
Not only this, but the article is simply flamebait:
But for all the hype surrounding another category of wearable devices — connected eyewear — early tests with Google Glass suggest battery performance may be absolutely awful.
I would hardly call 5 hours of continuous use "absolutely awful". Personally, I'd put that in the "could be better" category. If I'm sitting at my computer, I'm probably going to take them off; If I'm playing frisbee or basketball etc, I'm taking them off; if I'm just sitting around the house, I'm taking them off; etc etc. I think 5 hours a day is more than I'd use them anyway... but all those times when you take them off, they could also be charging.
The article gets much worse though:
If the user captures longer videos and uses Glass a bit more regularly, Stevens believes the headset will only last “a couple of hours” before the battery dies.
A device that only lasts two hours between charges is not the future of tech.
That wasn't a test. That was what he thought would happen, and he didn't try it. I doubt that claim is accurate. The screen and communications channels are running the whole time anyway, and that's probably sucking the majority of the power. Recording while doing so probably won't make much of a difference... but I'm just postulating too. Maybe he should have actually tested it, since he has one!
And then they follow it up with a statement, as if that was actually fact. That's rotten.
I've looked at battery powered pico projectors over the years (never got one though), and most claimed around 2 hours life. That's *nearly* enough, but I want to be sure I'll be able to finish a movie on one. This, IMO, is similar. If it gets 2.5 hours or more, I think that's pretty good for constant recording or playing (besides, where are you storing 2.5+ hours of HD video?), and this isn't meant to replace video cameras. I don't know what they're thinking.
A complaint about batterly life from someone that probably wouldn't wear this in public for more than 10 minutes... yeah, I don't care what he has to say. (I'm not saying I'd wear it all that much either... but I'm not going to berate the battery life of something I wouldn't use anyway)