There was a review in RC Report a few issues back about a lithium based glow driver, its like 100 bucks but its charge a few times a year and when you plug it up and hit the button it ramps up the voltage slowly instead of shocking the plug and it senses the resistence of the element so if its flooded it ramps up the voltage, also if you see consistently high draw you know your plug is on the way out, which for us rotor heads is a good thing to know as dead sticks are a bit more challenge than a plank.