Is it normal for the HB to shut off when you crank the motor on the boat? My 688DI use to occasionally, not every time. My new Helix 7 did, just plain shut off, had to press button to start it back up. Newer starter battery.

Is there a certain way I should be wiring my HB's? I have a big lead going to Starter battery and it is on a fuse block under my dash. Only other thing on it is radio and bluetooth heading sensor.

I am tempted to install my winter batteries from ice shanty power box under my dash on floor and have dedicated power to HB. I actually have 2 batteries I could use. 7 AH and 9AH. How long would they last, in hours?

thanks