Ok I get the idea now, what about a normal coil meter? Dosnt need batteries then .
A slightly stupid question, when the switch is set to both, how much does it matter if the batteries are of different capacities but same Voltage? Just thinking I could get both in same place if I use a heavy duty car battery and the deep cycle one. Otherwise one would need to be underneath. I like to keep them well off the floor (2 foot).
Battery to switch cable will be short anyway, I am using welding type cable at the moment. But I might replace that as well.
A slightly stupid question, when the switch is set to both, how much does it matter if the batteries are of different capacities but same Voltage? Just thinking I could get both in same place if I use a heavy duty car battery and the deep cycle one. Otherwise one would need to be underneath. I like to keep them well off the floor (2 foot).
Battery to switch cable will be short anyway, I am using welding type cable at the moment. But I might replace that as well.