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? What is the best portable battery pack for YI? Can YI Smart Dashcam be charged by the 12v in-car battery? 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?