Yes the battery is a bit of an unknown at this point. It has lasted through several hours of use without needing a charge but I have not let it sit charged for days without being used. I have lithium batteries in other things that can sit for months without use and be fine but I have also used some that would not last a day or so without recharging even if not used. So far the battery seems as good as that in a standard smart phone though. Best!