9v power options?

Joined
May 19, 2011
Messages
213
Hi all
I was working on a starship with the idea of taking it to a upcoming ipms event. No idea if I'll finish in time but I know there will not be a power supply situation available and I will need to power it independently. The system should work for 9v. Just trying to see if anyone is aware of any options other that a basic 9v battery as I fear the ship will drain it really quickly. It must work for a minimum of 7-8 hours I think. Any suggestions?
 

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