I forgot to mention that a 510 is 3.7 volts. Higher voltages like with the 510 passthrough at 5V tends to burn off attys well. I saw a post here that with 5 or 6V several dead atty were brought back to life after burning if off. The person had set them aside thinking they were dead but after they got a mod with a higher voltage they tried them again and they worked.
This is correct, but actually it doesn't require a higher voltage batt mod to do this. A box mod using a 3.7V 14500 batt will have a higher wattage and current than a regular 510 batt, which means that the atty coil is operating closer to 3.7V. A regular batt on the atty will give an operating voltage on the coil of only about 3.1V. I have found this same burnoff effect bringing an atty back up on a 14500 box mod. You don't always need 5V or 6V, just a true 3.7V can make a big difference. Since the atty is designed to operate at 3.7V, this is just making it work as it should but generally can't with regular batts.
