So the PSP slim DOES have a longer battery life...kind of.

[davygee]

I think there is a bit of a mixup here.

Right, the original battery in the original PSP gives gamers on average 5 hours play.  The new PSP has a smaller battery, but due to lower power consumption in the new model.  The smaller battery performs exactly the same as the existing PSP battery.

But one thing that will give room for improvement in the new PSP, is the extra 32Mb of Flash RAM.  Once developers get used to the new memory, then theoretically, the games will load faster and the UMD drive will be used less over the course of the game thus reducing the drain on the battery.

Anyway, I easily get 6+ hours playing games on my PSP at the moment using the original battery.  One thing that should be noted though, is by placing the system on standby uses a reasonable amount of energy to maintain.  I.e. your battery could be full, you play 1 hour worth of gaming and put it on standby and don't play the game for 2 weeks...when you go back, the battery will have been drained.

I travel 45 minutes to and from work each day and I can easily play my PSP 3 times daily for 3 days with an extra 30-40 minutes during my lunch hour without the need for a recharge.  So in practice, I can get easily get between 4.5 and 6 hours with the PSP on standby between playing times.