Can YI Smart Dashcam use a portable USB battery pack as its power source? Yes, it can use a portable USB battery pack as its power source. Related articles What is the designed capacity of the built-in battery? Can YI Smart Dashcam be charged by the 12v in-car battery? What is the best portable battery pack for YI? Can YI Smart Dashcam keep recording after car turn off? What is the temperature range of the camera? Is YI Smart Dashcam equipped with one or two lenses?