I leave my enhancements at factory settings, except for contrast. Move it to suit conditions. Always hunt with sepia, 2x, & black cross-hair with dot. Cross-hairs will move 3/4 to 1 inch at 100 yards. I use external battery pack. Internal batteries might last 1/2 hour in cold weather. I always put batteries in before I hunt & take them out after every hunt. Have experienced poi shift if left in for long period of time. My experience buy external battery & save money cr 123 are worthless for this scope. I have 60.00 dollars worth of them I will sell for 30.00 dollars. Feel free to ask any thing else I can help with. PM me if you want to talk on phone.