I have a Moog analog synth module (musical instrument) that takes a uses a AC plug that coverts it to 12V DC and consumes 7 watts according to the manual specs.
Would it be possible to safely create a portable battery pack for it using just standing AA rechargeable batteries in a series? I would image the battery pack I make wouldn't have a super long life between charges but I'm more concerned about messing up the electronics of my synth module. It seems like this post goes into some detail about how that might be done but I want to make sure its safe to do so first.
Would there be other batteries better to use than AA? C's for the duration? Remote Control Car battery packs?