HANDHELD POWER SOURCE
The HX500S is equipped with a CNB4 battery pack, which is the recommended power source for the handheld
transceiver. The CNB4 consists of nine individual nickel-cadmium batteries, encased in the lower case of the
transceiver. It supplies the 7.5 volts direct current required for proper operation. To remove the CNB4 from the
handheld, there is a button on the right side. This button will unlock the battery. Turn the bottom portion of the handheld
to remove it from the upper portion. To replace it, simply attach the lower portion properly, and turn it until it locks into
The operational characteristics of the nickel-cadmium (ni-cad) batteries under load are different than those of
conventional alkaline or lead-acid batteries. A ni-cad battery will maintain its operational voltage output level until it is
near complete discharge, when the voltage level will drop abruptly. For this reason, it is difficult to determine its state of
The CNB4 battery pack incorporates charging contacts at the bottom. Designed for use with the CSA50 Drop-in Charger,
the battery pack may be charged when it is connected to or separate from the transceiver.
The CSA50 will slow charge the CNB4 in approximately six (6) hours. To operate the charger, plug it into the specified
power source, then insert the battery pack into the charger. The contacts of the charger must connect to those of the
battery pack, so be sure to insert the battery pack correctly. A red light on the charger will illuminate to indicate that the
contacts are connecting and the battery pack is being charged.
NOTE: The CSA50 Drop-in Charger features a switch at the back for selecting the desired charging
voltage of 120 or 240 VAC.