Dear customer: If you define our time-lapse camera as a way of taking a picture in 5 seconds to combine into a recorded video, you can run the machine for about 2 months with the use of brand new alkaline 4 AA batteries. But what you need to ensure is your memory card. The size of the video formed under the attributes you set is smaller than the volume of your memory card. Otherwise, the TF card will automatically shut down when the stored information is saturated. Hope our answer is helpful to you. best wishes, Dsoon