Only buy really good cards.
I won’t touch a card that isn’t Class 10. Specifically SanDisk ultra or SanDisk Extreme.
Each individual camera needs to format its own card each time. You can do this in-camera with the “Delete All” function. Almost all cameras have a built in formatting at the end of that process.
Properly formatted cards, of high quality, are the absolute biggest thing you can do to improve your camera performance.
Also, treat your trail cameras like you would a decent digital camera in any other situation. When you pull them out of the field, stick them in an airtight container with desiccant packets to dry out any humidity. Stick a little silicon lubricant on the seals (like you would use for O-rings), and spray the dust out with some canned air. Don’t toss them around like a toy, either. They are electronics, after all.
Some cameras perform best with lithium batteries, because the voltage doesn’t drop as much as the battery depletes. Some parts of the motherboard charge a capacitor, and are less effected by amperage/voltage dips, but the motion sensors seem to be the most effected by the drop in voltage/amperage of the batteries.
I have some Browning’s going on their 4th or 5th season with little to no problems.
Once I started using Lithium batteries along with my maintenance program, I have only had 1 failure at all from any camera. I had an inexpensive SD card corrupt on me and wipe probably 500+ pictures. Couldn’t re-format it or anything. It was just toast.
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