I've been spoiled with Aimpoint battery life dating back to my first ML2 then the T1 and T2. Got the P1 and couldn't get more than 2 months battery life with it. Now I have several of the P2s and have gotten from just less than 3 months to 4 months using Duracell batteries. What's everyone getting for their battery life. I use setting 7 for my carry gun.