Been my experience as well. I run solar panels with rechargeables and no problems. My buddy has one and his has been out over a month with regular batteries and is still at 100%. IDK why mine burn batteries more than his do.
coverts are still on att I just activated a new one last week
Thats Funny because I sent 2 coverts in this week and both were not repairable.... They offered to replace both with new cameras at 50% off but I had to use covert wireless simm and choose a by the picture plan.....
I just bought another Spartan 2 days ago.
The spartan I put out on 9-24-17 has taken tons of pics and batteries are still above 90%... My coverts would be at 45-50% or less by now. I have not had the spartans long enough to really know if they will be the answer but so far they are great. I ran 2 coverts for several years and would have bought another if they would have kept them on ATT.