Wired up this 5V media player with a 3 to 5V booster board and a usb charger board*. Both are inside this sandwich with a lipo battery and a custom aluminum back plate. I wired the three boards together with wrapping wire because it's thin and flexible, but that's probably "the wrong thing to do™". Anyways once that tiny lipo is charged up, we'll see if it's all behaving.