Having a battery pack to operate your compressor frees you up to use the airbrush system anywhere you want, even in remote locations, without the worry of needing electricity. Also, it is hugely convenient to have a back up Battery Pack so you can have one pack charging while the other is in use for all day continuous airbrushing. For a complete description of the Graftobian Walk-Around™ GlamAire Airbrush System, click here. This battery pack is designed only to work with the Walk-Around™ Mini Compressor. If you purchase this battery for any other use, or to use with a different brand of compressor you do so at your own risk and the battery will not be returnable under those conditions. We are not responsible for any reactions, failures or possible harms if it is used in any other manner than what it was intended for, or with any other brand of compressor other than the Graftobian Walk-Around™ Mini Compressor.