Just bought a pandora battery, but...

Right I just received through the post my PSP pandora battery. Its a fat PSP one (3.6V 1800mAh).

I plugged it in and the green power light came on but nothing. I realised that the battery was dead so plugged it in to charge and tryed turning it on again but again nothing. If I hold the power button up for a few seconds the green light goes out but nothing is displayed? I have also tryed removing the memory card but same again.

I tryed it with the normal battery aftrewards and it was fine so it can't be the PSP.

Do I have to wait till it's fully charged or am I missing something?

Sounds almost like the problem I'm having. I wish I could help ya