Lithium battery pack is the only way to go. I’ve had my camera online since late November in the frigid Midwest weather and I’m still at a hundred percent. You’ll see the comparison of my two cameras installed the same day, one with Lithium pack and one with standard AA’s. Huge difference
These new lithium packs are cool, I like that it has a button to show how much life it has and you can watch it go up while charging. Also that the new solar panels will recharge these lithium packs so you don't have to worry about going in and changing them! I have had one with the new setup out since August that I haven't need to worry about!
I run these lithium cartridges in about 80% of my cameras and have yet to have any issues. . . . . I get incredible battery life using these cartridges and I would highly recommend using them for your cell cameras
Much needed upgrade from the Gen 1 Lithium. They don't get hung up in the camera, and it has a 3 light battery meter on the pack itself. I also feel like it lasts longer than the Gen 1 lithium battery without the solar panel attached.