Might be a neat thing to have, considering it's so cheap. But I think they might be a tad on the optimistic side with that "10 hours talk time" claim. My phone won't even do that with its heavy duty Li-Ion battery. And they claim to be able to do it with two AA batteries? Me thinks not. Try "a few minutes talk time". Which may be enough (especially if using text messages and not voice calls). A "10 hour" claim is pure nonsense. Maybe they're counting the 10 hours you'd be yelling at the silly thing after is exhausted itself in a few minutes as part of that "talk time"?