I use a Lowrance Elite 7 Chirp.
My power supply is a twin battery set up using a Blue Sea ACR and battery isolater.
I recently discovered that I can display battery voltage on the FF screen.
A useful tool.
However, after electing to use this display I have become concerned at the apparent power consumption of the FF.
The voltage displayed after I switched on the FF was 13.1v (system plugged into smart charger to maintain levels). But I became alarmed as I watched this voltage drop away until after about 15min, it had fallen to 12.1v
No other devices were on.
According to the manual for the FF, it draws .75amps.
I have to admit this means nothing to me and as much as I have tried to understand what this is in practice, I am none the wiser.
My question is; is this to be expected. Or is there a fault I am unaware of eg. bad connection somewhere, too small gauge wire for power supply etc.
This occurrence raises an issue of twice having a flat house battery following fishing trips where boat was at anchor and no motor charging batteries.
Any thoughts would be much appreciated