Hmm, well I know my iPad won't charge off the USB ports my PC has, it syncs fine just forget about doing any serious charging. It's the main reason for me to always have my iPad charger (~10W USB power brick) in my bag when ever I travel with it. I think I can also charge some other USB devices with it, iPod/iPhones for a start.
As for USB charging a PSP, well a USB to the PSP's 5v DC port adaptor as seen on many a third-party accessory makers' PSP datalink cable is the easiest starting point. Even if the PSP does now support USB charging via its USB data port, it's something I don't trust.
I swear I've seen someone offering a USB hub with power switches controlling individual ports, at the time I'd considered it a folly like those xbox huge USB hubs with 100+ ports.
--Rod.H
"Ah, the PSP! The one 'true way' of enjoying a JRPG! In public, too!"
As for USB charging a PSP, well a USB to the PSP's 5v DC port adaptor as seen on many a third-party accessory makers' PSP datalink cable is the easiest starting point. Even if the PSP does now support USB charging via its USB data port, it's something I don't trust.
I swear I've seen someone offering a USB hub with power switches controlling individual ports, at the time I'd considered it a folly like those xbox huge USB hubs with 100+ ports.
--Rod.H
"Ah, the PSP! The one 'true way' of enjoying a JRPG! In public, too!"