It's not something I'd recommend. There's no way to tell really what kind of cell is in it and what it's capabilities might be. It may or may not even fire a 1 ohm coil or if it does may (hopefully) back off the output to match it's amp limit regardless of what you have it dialed to. Given that it's regulated with a boost circuit the amp draw could be 6 amps or more depending on how efficient the circuit is. Very high for an Ego style, 2200mAh or not. If you should decide to try this pay attention to how hot the body of the Ego gets. If the main body starts feeling hot STOP.