ZZR 1100 Battery placement

It happened... I knew it would someday... Left the keys on and drained the battery... DOH!! Ok I read somewhere the battery is under the tank!! Yep sure is took me half an hour to work out how to get to it
What a great idea to place the battery in an easily accessible place.
I love my bike and have been really enjoying it's capabilities, comfort, acceleration, fuel economy but this is one disappointing design flaw.
Is there a more simple way to charge the battery?
Cheers
Matt

I love my bike and have been really enjoying it's capabilities, comfort, acceleration, fuel economy but this is one disappointing design flaw.
Is there a more simple way to charge the battery?
Cheers
Matt