PLEASE NOTE Sub-Ohm'ing is for the more advanced users only, as extra safety precautions should be practiced when using a sub ohm tank or battery. Make sure you are aware that you are using the correct battery for the coil inside your tank, as under no circumstance should a Sub-Ohm tank be used on a Standard Ego or Variable Voltage battery. For example, if you have a 0.5ohm coil, your mod must be able to fire atomizers of 0.5ohm or lower. Sub-Ohm tanks are used entirely at the buyers risk and we accept no responsibility for failure or damage caused due to misuse.