I'm pretty anxious to check this baby out but winter has me socked in pretty good right now. I'm reading about setting this machine up, the settings, not the actual machine, which took two minutes to assemble. I'm a little concerned about the flimsy looking battery hinge covers, so I'll put a large rubber band around those when in the field. I also found the arm cuff to be a bit snug, but other than that I'm tickled pink. I have a big pile of 2650 mAh rechargeable Duracell's that I installed for 2-3 quick starts. I got a quick four beeps on a completely fresh charge. I took them out immediately though as the manual says 1.5 V. batteries only. With the Factory Panasonic 1.5 V batteries I got seven quick beeps on start up and I had to plug headphones in because I was getting a tone off everything inside my place on sens. four ! I haven't even used this dirt weapon yet and I already have a good feeling about it. Is it true that you lose depth with battery drain, and how many beeps before you replace your batteries? I'm used to NimH rechargeables that stay strong until a quick death at the end. Come on spring ! I welcome an tips, observations, heads up about the Tejon that you can offer a new user. Thanks.