Main battery flat with red arc isolater

[macca]

I was having a bit of trouble thinking that the radio alone would have flattened your battery overnight.

Cuppa some of these "radios" need bigger cables that your starter motor

[Cuppa]

Cuppa some of these "radios" need bigger cables that your starter motor

Yeah, but I’d reckon that most folk with one of those big powerful doof doof units would already know how the thing was wired up ...... hmmm but then again maybe not. What? Pardon? Couldn’t hear you properly, I have this strange buzzing in my ears.

[threedogs]

I you intend to run your radio say at camp or watching some sport , wire it hot to your Aux battery and this problem will be avoided,
Same goes for you UHF wire it off the AUX battery as well. if your waiting for some to arrive you'll be safe knowing youre not flattening the Main.
Leave the start battery for that starting

[FNQGU]

Good advice from TD.

It doesn't take that long when the drinks are flowing around a camp fire for the stereo to flatten your battery. Not really worth risking your starter if you are in the middle of no where.

I've also gone the path of re-wiring my UHF to the Aux battery, just in case you want to monitor while in the camp or are expecting a call from someone not yet returned from a bush walk or fishing the banks of the river or whatever.

It is also a good idea to have a jump starting switch that parallel's your batteries for remote trips.