Kenwood TH-D72A - Manual (Page 15)

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To connect the transceiver to the cigarette lighter socket in your vehicle, use an
optional PG-3J Cigarette Lighter cable.
When the PG-3J is connected to the cigarette lighter plug, the transceiver
automatically starts charging the PB-45L battery pack. While you operate the
transceiver, it charges the PB-45L battery pack in the background.
To connect with an external 24 V power source via a DC-DC converter, only use the
optional PG-3J Cigarette Lighter cable.
Using the PG-2W DC cable in this situation may cause a fire.
Note:
X Do not use the PG-2W to connect directly to a vehicle battery (12 V). Extensive voltage could
result in damaging the transceiver.
X If the input voltage exceeds approximately 17.5 V, the transceiver automatically turns OFF.
PG-2W
24V
12V
24V
PG-3J
12V
12V
24V PG-3J
DC-DC Converter
DC-DC Converter
Socket