Really depends how often the unit is triggered. External temperature (cold mainly) has some effect as well. My porch cam lasts about 30 days. It’s triggered about 30 to 40 times per day. Another one of my cams lasts 60 days... another one 3 months ( much much less traffic). If your camera is in a less than convenient location, consider the solar panel charger. Changing batteries is a pain after awhile. Especially if you have 4 or 5 running out at different times. You tend wait until all of them expire and change them all at once (that is if you have extra hot swappable batteries charged and ready to swap).. it’s not an inconvenience the first couple of months, but trust me, you’ll either half way keep up with it, get a second pair of batteries, purchase an extra long 30’ cord from Amazon and run it to an indoor outlet, or best bet - get the solar panel chargers. Hope this helps.