Central Community Communications-Power Offering

I just found an old stereo in my garage that is a perfect fit for this project- it's an Insignia something iPod dock (Best Buy's house brand.) I always ran it off 120v mains, but it also can run off C-cell batteries, at 6v! I gutted the system last night, and will try to update this log + post pictures. I'm also ordering a 12v to 6v converter from ebay- more on that when it arrives!

I made a quick diagram to show power in- power out at a basic level. To start, I'll use what I have laying around (including AC/DC converters, SLA batteries, etc.) My budget is pretty tight right now, so some parts will have to be bought one month at a time (like the charge controller.)

The 19.5v DC output is for most laptops.