Just installed a new Yaesu FTM-400XDR in my pickup truck. Connected power directly to my only power source, the cranking battery. I realize it will drain that battery really quickly if the engine+alternator is not running. Someday soon I will invest into a dual battery setup with an AGM deep cycle battery as my secondary power source. Any concerns with the radio connected to the starting battery? Will it cause any damage or drain issues during normal / heavy road use while driving?