Doing some garage spring cleaning. Need tunes in the garage. I've decided to build a stereo box with an old head unit. Self contained with speakers. As I was mentally building it and finding random stuff as I clean up, I found a few small 12v batteries. Which made me think why not a portable box?
I've got the stereo, the batteries, a "wicked set of tools" and several old 12v wall warts. At first, I thought I could wire the wall wart and stereo to the battery and plug it in for goodness. However, I started to think that constantly charging the battery might be a bad thing. If so, what should I look for to stick between the wall wart and battery to make sure the battery doesn't overcharge while also providing constant power to the stereo when turned on? I just don't know what to search for online. I figure there's a cheap or even a DIY option, just don't know the key word to look for. Looking for battery charge controller brings up expensive options. I wanted something cheap.
OR, would direct wiring to the wall wart be fine and it'll keep from overcharging the battery while also giving the stereo power?
If there's not a cheapie option, I'll just go direct and forgo the battery portion. Just an oddball project idea.
-Rob
