about an hour or so
It takes about 2 - 3 hours for a full charge
Connect it via a USB port - the time taken to charge it - is dependent on the quality of the battery in the PSP.
Charge your psp fully, then goto your system information --> battery information. It will tell you how long you have left. Mine claims 6.5 hours, but it seems around 4 if im playing a game
NOt goes up to its max every time you charge for a long time
it takes a total of 30 min to charge completely when you open the box
If you want to play it you can or you can let it recharge fully and then play it. (The PSP will still charge if you are playing it with the charger)
Yes you can charge a psp. Every packaged psp sold comes with a charger and battery.
to charge it in a car but it takes a long time
Yes, the chargers for each model are the same. It can charge a PSP 2000 or a 3000, etc.
Some firmwares allow the PSP to charge from a USB connection to a PC.
A PS3 will charge any device that can charge from a USB port. This includes, but is not limited to: PSP, Ipod, and many cell phones.