I have a pre lit door wreath and no good way to plug it in. I was hoping i could find a small little battery pack to plug a regular plug into. Does that exist? I can't seem to find anything online.
Your wreath operates on 110V AC. A battery will not do anything. You need an inverter to change the electric power from 12V DC to 110V AC. This will be a bulky item. Maybe you can find a set of lights that runs off a battery and replace the original ones.
You could try re-wiring it to connect it with a battery pack, something that's not too heavy so u could hide it in the wreath. That mite be an option. Or check at Home Depot, maybe they may have what your looking for.