I'd only be concerned if the maker's support doesn't answer your questions. I know this maker's units are built for cost so I never expect them to "sound" nice.
I've had my Eee PC 1005HA for two days. I was using it earlier and I'm certain the battery life indicated on the task bar icon was 30%. I then shut down my netbook and after an hour or so turned it on again. This time, the battery life showed "100% remaining". I've been using it for about 40 minutes and it hasn't changed since. The fan's going on really loudly as well. Should I be alarmed about this? Thank you