Data from latest experimental:
Copper tubings are used in some recipes: several ammo types (.40 FMJ, 9mm FMJ, .223, 5.56 NATO) require them - don’t know if this is true for the stable build.
The cordless drill is currently without any function and it’s charges won’t get used up. It could be reloaded with batteries (theoretically, it spawns fully charged and the charges are never used), but it can’t be unloaded.