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• Set eavesdropping function from the Base Station menus:
7.4 AA Battery Type: Alkaline/NiMh
7.4.1 About battery type
FreeSpeak II wireless beltpacks are supplied with Li-ion batteries and battery
charger. However, in some cases you may wish to use AA batteries. Alkaline
batteries can be used as a quick, easily available replacement. NiMH
batteries can be used in environments (for instance, high
atmospheric/hyperbaric) where Li-ion batteries are prohibited.