In my searches, so far I have not found a alkaline battery for the Tactacam.
The Lithium batteries for the Tactacam are manufactured in China.
I did find some information that may be included in the manual as follows:
1)Always charge the battery before the hunt (or using).
2)Replace the battery every season.
3)In cold weather, carry an extra battery in your pocket.
4)Power on and pause your camera when you get to the stand. Your camera will power itself off after 3 minutes. Repeat the process as needed while hunting in cold temperatures. This will allow your camera and battery to warm up and perform better.
Tactacam 4.0 only when using WiFi battery life will be greatly reduced do to the extra battery consumption. At this time, maybe there was no Tactacam 5.0??
Lithium rechargeable batteries basically do not take on a memory. Partial discharge cycles are better. Recommend after 30 charges to almost completely discharge. This allows for the battery power gauge to recalibrate.
Another site stated that the voltage dropping below 2.5 volt, the battery may not recharge on some battery chargers.
I did another search looking for high capacity batteries. the 1350 mHa is the maximum I found and this battery is specially designed for the Tactacam. The reason I did this search, for some electronics there are higher capacity batteries available. They are the same physical size but with these batteries the electronic device will perform longer.
As an example, a vehicle battery with a higher cranking amp will last longer when trying to start a vehicle in colder weather, operating a winch etc. Some of the older winches drew a lot of power. The higher cranking amp batteries are heavier in weight as they have more plates. The next time one goes, say to WalMart where batteries are on display, lift the different cranking amp batteries of the same physical size (ones for a ride on lawn mower, golf cart etc.). The lower the cranking amp, the cheaper the battery price will be and the lighter its weight.
All the best.