I think that six hours is good! More would be nicer, but it's unlikely that most players will use up six hours in one sitting. I only recharge my GBA about once a week as it is, I think this is a small sacrifice - and Nintendo is usually pretty honest, even conservative, about battery life. When Sony says 2-10 hours for PSP, I take that to mean 2 hours 90% of the time, and 10 hours 1% of the time.