The Federal Motor Carrier Safety Administration (FMCSA) is issuing this safety advisory to provide notice and information to owners and operators of CMVs concerning incidents that have occurred relating to the possession and use of battery-powered portable electronic smoking devices (e.g., e-cigarettes, e-cigs, e-cigars, e-pipes, e-hookahs, personal vaporizers, electronic nicotine delivery systems (ENDS)) and the transportation safety risks associated with the use of these devices.