Ok I'm kinda bit of an electronics neophyte. I just learned. That for my diy e cigarrete battery I. Need to switch the battery to the load with a mosfet. Resistance load.I'm using a mechanical switch to. Close the gate. Now I also need the gate open when the load is removed and voltage is applied for charging. What do I need to do this? Hopefully that is specific enough. I'm on my phone here because my computer died.