This cordless drill by František Hajdekr shows how to hide functional elements in plain sight. Tucked under the handle, the Power Functions battery pack for this motorized technic drill looks just like the battery pack for a real cordless drill.
Of course, what good is a battery if it doesn’t power something? Pull the trigger on this model and the drill bit spins. The M-Motor that powers the drill bit fits neatly inside two half-cylinder “tipper drum” panels. By using a Power Functions control switch for the trigger, the drill can turn both clockwise and counter-clockwise.
You can also see this model in action on František Hajdekr’s YouTube channel.