DSLR Camera Trapping- Sensors and Triggers 

Here are the main two sensors I cover in this video
Camtraptions PIR V2 : (now they have a V3) store.camtrapt...
Battery life: 6AA batteries more than 2 weeks of life
Cognysis Sabre:
Battery life: Depends on the mode, depends on if WIFI is enabled up to 71 hours (cognisys-inc.c...) OR if you connect to a 12V power supply I've been able to get more than 2 weeks at a time.