Operating fish finder using lithium battery

[Bduck]

I'm in the learning stages of using a LI battery. I installed a 24V battery to operate the new Minnekota bow mount. I added a battery monitor to watch for power drawdown. I've yet to get this new setup on the water and won't anytime soon. The link provided is the monitor installed. 

Amazon.com: Renogy 500A Battery Monitor with Shunt, High and Low Voltage Programmable Alarm, Range 10V-120V up to 500A, 20ft Shielded Cable, Compatible 12V Lithium Sealed, Gel, Flooded Batteries,Black : Automotive