Today I received my FT-857 from Yaesu Repair. $160 in damage from a low battery.

I am going to be putting either a low voltage cutoff switch in my power line or put a dedicated battery in the trunk. I am leaning toward the latter with a charger circuit that can put the battery online for charging but take it out of the car circuit when the key is off or the engine is starting.

I’m not sure if I’m going to have the charging circuit in all the time or actually kick in at a minimum and kick out at a maximum voltage. I’m going to read more and take advice from the experienced before I do it.

In the mean time, I’m leaving the ‘817 in the car as it runs from 10v!