Hi Wil , the battery automatically gets charged when you switch the unit on !!
If it is flat leave the unit on for a few hours .

I know of no USA Brochure of midi files and styles for the Gem .
Only the ones issued by the Italian company .
If this is not the case will some body please let us all know .

The choice of 3rd party styles is poor !!
unlike the other major brands !!

regards ...........giovanni