Again, this does depend on the individual dog camera you have chosen, however, most dog cameras are mains powered, and do not require batteries (none of those in our top 10 require batteries). The majority of pet cameras need to be connected to Wi-Fi to work, so bear that in mind if you live off-the-grid. Depending on your model, you may need a Micro SD card to record footage of your pup, or it may come with included or additional cloud storage.