Ansmann Wireless Mic Battery 19" Charging Station for up to 16 AA NiMH batteries. Microprocessor controlled charging station for use on stage, studio, production facility or in mobile "on the road" racks. Built-in faulty cell detection, deep cycle charging, individual monitoring of cell blocks. Automatically switches to trickle charge; Charging current of each inserted cell is approx. 700 mA; Charging time around 2-3 hours; 3 year warranty. Excellent for wireless applications including wireless microphones, in-ear monitoring, and other Pro AV applications.