I set my new M-80 out last Wednesday 10/27/11 with 8 alkaline batteries. Went to pick up card today and batteries were dead. When I got home and checked the card it only took 72 pictures, the first day, in the plotstalker mode and then had nothing on camera after that. Was set at 3:14 and lat pic was before 4:00? Could it be bad batteries? They were radio shack alkalines? I have lithium batteries for it now. Anybody else have this problem? Any ideas or suggestions would be appreciated. I hadd it set in the combo mode with plot stalker and night pictures?