Be careful about amazon. There are some rumors of fake batteries running around on their from various sellers. I bought a pack of nonlithiums that seemed to have issues a while back.I hear that Jeff bezos guy has some deals
I use Energizer Ultimate lithiums in all of my trail cameras and the best deal I've seen is at Costco. Our Costco has them for $.85 each in the 20 pack ($16.99). I've never seen them at such a low price.Right now Costco is selling a 20 pack for $15! It doesn't get much if any cheaper. Aside from that, try BatteryJunction.com, great prices and great service.