There may have been a short circuit or surge in the battery which would immediately short circuit a new coil, giving you the atomizer short error with every new coil. I hope you bought two of the batteries as well as an external charger for them. The usb port is not really meant to charge the batteries, except maybe in an emergency, like a power outage. It is meant for firmware upgrades. I'm glad you've fixed your problem. Happy vaping!
