Originally Posted By: ToroHow do the AA’s hold up? Should be a game changer if the manufacturers can get these units to run off AA for an acceptable amount of time. The units work with virtually any AA battery which is really nice including LiOn, NiMH, alkaline, Lithium, etc. Bering will include a set of 4 rechargeables with a charger with each scope. There is a setting to adjust the battery meter depending on type of battery, as the voltage varies considerably on different types of AA batteries.
In my tests, I got 4 hours without the LRF and 3 hours with it on continuously. However, for people who hunt cold weather or just want long battery life, do yourself a favor and just run a battery pack. The new magnetic USB connector works in any direction and has a super strong connection. I am typically not a big fan of magnetic scope cables. However, Bering put a lip around the magnetic housing, and it is stays incredibly well and holds super tight. It is the best magnetic connection I have tried. Run a battery pack and run all night and keep the 4 rechargeable AA's as a backup source. The scope will switch to the internal if the external runs out of power or if somehow the user yanks the connection out.