Kind of curious as to why lithiums need to be used in trail cams.
I'll just copy/paste since it's easier. For more info just do a Google search and you can see the technical details if you wish to learn more.
TLDR: more power, lasts longer in extreme temps
Single-Use Lithium Batteries
Lithium, an exceptionally light metal, gives lithium batteries the highest energy density of any battery cell. Thus, they can store more energy than alkaline batteries or any single-use battery of a comparable size. And they are superb performers in extreme temperatures, both hot and cold.
USE WITH CAUTION: Their higher voltage capacity makes lithium batteries too powerful for some devices and may damage circuitry. Read manufacturer instructions for battery recommendations for individual products.
Best use: High-drain devices (eg. digital cameras) and most (but not all) moderate-drain devices (eg. headlamps, toys).
Pros:
Longest life (by far) in single-use category; in a digital camera, lithium batteries hypothetically may produce 100–200+ flash photos; alkaline batteries, 20–40+.
Superior functionality in extreme temperatures, from well below zero to over 100°F.
Very long shelf life.
Light weight (approximately 30 percent lighter than equivalent sized alkaline batteries).
Cons:
More expensive.