Can I charge and use this at the same time?
I hear that the battery doesn't last long, can I charge this device and use it at the same time?
Yes you can charge and use it at the same time although not sure how fast it will charge that way. It charges quickly, charged mine for an hour and it lasted about 4 hours, I've had it last 5 hours and not go but I think that may be the max on a full charge and that was continuing use.