Turn-Kill-Key

This Thing is a kill-key of a special kind. It fits into a regular 2.1mm Recharge Port (see https://www.thecustomsabershop.com/Switchcraft-21mm-Power-Jack-P822.aspx), but instead of insert/remove, this kill-key is in fact a turn-key: by turning it you can connect or disconnect the battery to your electronics without actually removing the kill-key.