Hi again guys - more noobish questions coming... :)

1) Is it recommended to keep your ppc connected to the mains power even when it's fully charged? I read somewhere you should have it connected except when using it. (it's an ipaq 4350)

2) Can you still use it when connected to mains power?

3) If I were to buy a battery now, is it factory sealed, so that if it's (say) not inserted into the device for a year or three, it will still be OK. I'm asking this because the 4350 itself is no longer available and I'm worried that HP will maybe stop producing the battery and therefore I'll miss out if I wait until I actually need it. OTOH I don't want to buy it now, if it's likely to deteriorate before I actually use it.

Thanks as always guys. :)