Has anyone actually got any proof of that, or is this just a self-perpetuating rumour? I think it is more of an educated guess than a rumor. Assuming it has a screen with higher resolution than the DS (otherwise what is the point of the higher end PS2 chips), plus a motor for operating the disc drive, plus a more power hungary chip set than the GBA or DS, and there's not much chance of beating 4 hours of life without a major advancement in rechargeable battery technology. That's not to say that can't squeeze more than 4 hours, but it seems to be a very unlikely prospect. It's not expected to play for 4 hours straight, but what about 3 or so shorter increments during a long trip or while away from home?