NiMH batteries are charged within the transmitters
Versatile unit charges ATW-T220c handheld transmitters and/or ATW-T210c UniPak® transmitters (in any combination)
Built-in safety feature monitors cell voltage and automatically turns off the unit if problems are detected
Automatic shut-off if alkaline (non-rechargeable) batteries are installed
Automatic shut-off if damaged batteries are installed
Maintenance charging prevents battery self-discharge until the transmitter is removed from charger