Quote Originally Posted by xwingband
I guess you could use a charger plug as the "key". I believe Erv sells and recommends a plastic one is because it will not conduct electricity and it's a smaller form factor.

In fact I think in Erv's tutorial he mentions something about using the plug but soldering a screw to it or something...
DO NOT under any circumstances use a metal "dummy" plug as a kill or key switch in a recharge port--this will create a short in the batteries, causing + & - to effectively be wired together.

Use something plastic/non-conductive or... bad things will happen!!!

This may already have been clear to people posting/reading this... but just wanted to be sure.