My boys (currently 4 and 6 years old) each have old PSP 1000's that they play the crap out of. I got them the old 1000 series (as opposed to the "Slim" 2000's and the smaller "Go" 3000's) because the old 1000's have a metal frame which makes them incredibly resilient to drops. I didn't think about this when buying this Power Pack.
I'm sure it would have worked as advertised. It seemed to charge up fine (got a little warm while doing so), and even pass-through charged the PSP while I was waiting. The stand feature seemed especially convenient for restaurants and whatnot. However, the power pack did not survive the first 4-foot drop. The stand, as well as the clamps attaching it to the PSP broke, rendering the thing practically useless. The PSP itself, of course, is fine (they really made the old 1000 models well).
But, for less than 10 bucks, I don't really have any room to complain. Had I been more careful with it, I'm sure it would have provided days of usefulness before one of my boys dropped it. I'm sure it would survive even longer in the hands of a responsible adult.