I'm trying to build one of these myself (TLDR; It's a lighting setup for outdoor usage to illuminate a pingpong table).
I would like to know what sort of batteries are available that might help me power this. I'm a novice and the only types of batteries I'm aware of are AA/AAA batteries, button cells and car batteries. Are there batteries that lie somewhere in the middle of this spectrum and are easily available? I'm looking for a rechargeable battery that can power this setup for 2-3 hours. I'm suspecting that the LED lamps might require somewhere around 20-30 watts.
As for the rest of the setup I'm thinking of using PVC pipes to build the stand that holds up the lights and some sort of clamps at the bottom to clip it onto the net of the pingpong table, while the battery itself can rest on the ground.