I guess I've been fortunate. All 4 of my Moultries are still working fine. I have 2 of the big black ones (7-8 yrs old) one uses D batteries and the other the big block battery. I have an A5 that uses C batteries that 's still working fine. It's about 5 years old. My newest one is an 880IR. It's going on it's 2nd year. All of them work fine. Having said that, I'm sure when I go check next week they will have quit working. The Aldeer voodoo curse.