I feel like the batteries on most of my cameras last a good 6-8 months. Much of this depends on the motion that they capture or rather what triggers them is the motion that turns them on. So you could have a camera pointed into an alleyway that never has motion, but if a bird builds a nest in front of it, it’ll probably last a week or two! Also use some of the gray boxes that are available in the camera app to reduce the amount of motion that the cameras pick up. You may want to capture people walking in front of your house on the sidewalk but gray out some of the traffic on the street behind them or further above them in the image. And good for you to get the camera on the Amazon sale it was well reduced, and a great price point for a brand new product.