Sometimes you can start an eGo back up after a short circuit by 5 clicks on/off or putting it on the charger for a minute or so. One or the other or both. I've had success with all. However, the next short will likely kill the battery.
Nice to know also, I did something to mine yesterday when was trying to put a new wick on my clearomizer, i guess the coil ended up touching the side of the case or something, it came on for a sec then nothing, I thought i had killed the battery, i try on off nothing, so i plug up to charger and gave a try and it went back to working, Not sure I am going to be able to rebuild the heads like i thought, I figured i could just replace the wick ( ordered some) but now I am not so sure all the videos show replacing new coil wire and new wick not just replacing the wick Like i thought.