Sounds good on paper. In the real world of radio controled training equipment, you had better plan on backup equipment OR a backup system if it is all linked together. Models with screw down caps utilize spring loaded battery contacts. In point signal only mode, about one hunting season. Economy with daily use.
NiCad batteries outperform alkaline in sub freezing temperatures.
Use of consumer brand 7.2 volt rechargeable batteries isn t recommended. These custom collars permit the speaker assembly to roll backward, as needed, to prevent hanging. The canister is easily cleaned, non-corrosive, and weighs about seven ounces. Battery and adjustements are protected by a threaded end cap with internal rubber seal. Frequently, a phone call can clarify something or determine IF there is a problem and what the best course of action might be.