Hello, We bought a Blink camera around 3 months, we are having to replace the batteries every 1-2 weeks. We are using the Energizer Lithium Ultimate. We have set the camera to only activate during certain hours when there is little activity (overnight) to see if this makes a difference. It doesn’t, the batteries are still only lasting around 10 days. We also have another blink camera in a different location, at our front door, which gets much more use, yet the batteries have lasted for the full 3 months so far.