The Electric Wrench works the same as the Bronze Wrench, but instead of taking wear and tear with use, it uses electricity. Thus, it will never wear out, like Mining Drills. It can be charged in BatBoxes and other storage devices, as well as by batteries.
The Electric Wrench has 2 different modes. You can switch between Lossless and Normal mode, Lossless mode will use a lot of more power. They switched by holding the M key and right-clicking.