I just hope battery life ism't at the level of the first PSP model (was that the 1000) which had something like 4-5 hours. I'm preparing for the worst given Iwata's comment though. Personally I consider a battery life of less than DSLite to be worse than unacceptable.
less than 15-19 hours with a fully charged new battery?
get ready to be disappointed, seriously the DSLight has awesome battery life. as long as it's 10 hours I don't really see it being a major problem. Hell 8 hours would be fine IMO. Unacceptable would be psp 4.5-7 hours.