watch 01:51 The Loop (Games) Do you like this video? Mechanical Battery Piece is dropped by Skeletron Prime in Expert Mode. It is a material in the Mechanical Cart. Update Info v22.214.171.124 Added to the game. Retrieved from "https://terraria.fandom.com/wiki/Mechanical_Battery_Piece?oldid=547243" Categories: Items PC 126.96.36.199 Materials Expert Mode Items Community content is available under CC-BY-SA unless otherwise noted.