Ring doorbell 2, 3 week battery life

Last summer I bought a ring doorbell 2. All the reviews said you'd get about 4-6 months out of the battery. I did have some motion features on and was getting about 2 weeks battery. I have since turned off all the motion, so now it's just a doorbell that chimes on my phone, yet I still get only 3 weeks. I have even sent it back for a replacement in case it was a faulty unit, bit it's the same, just 3 weeks. How is it this bad?