I am looking to get a lithium battery for 2 of my graphs on a boat. Would the 14.8v30ah battery be the appropriate battery to run one Humminbird Helix 12″ and a Garmin Echomap 126sv with livescope LVS34? If not could you please point me in the direction of the battery that I might want. It does not need to be portable, it will stay in my boat full time.

Based on your electronics and the LVS34 transducer, your total amp draw is approximately 6.5A according to manufacturer specifications. Given that setup, my recommendation is a 16v 75ah battery for powering your electronics. With that configuration, you can expect roughly 14 hours of runtime. A 14.8v 30ah battery would provide a shorter runtime, estimated at around 5-6 hours.

The 16v 75ah battery operates at a higher voltage, and many users report improved graph clarity when running higher-voltage systems. In addition, it offers approximately 20 percent longer runtime compared to a standard 12v battery, making it the best overall option for your application.