Fishfinder & lights work off a battery?

Hello I have a new Mercury 20hp engine without Electric Starter.
I also have a Sitex 106mkii (CRT 6.7” color) fishfinder.
I read that people who run fishfinders off of batteries usually have the portable smaller types.
Will mine hold up or will it drain the battery before I can fish

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3 Responses to “Fishfinder & lights work off a battery?”

  1. BOBBER says:

    I run my big motor(electric start) live well/ lights /depth finder with one battery and I have a seperate battery for my trolling motor. My depth finder works great off of my main battery. My battery holds up for the entire season.

  2. Brandon W says:

    It should be fine running the fishfinder and the motor off the same battery as long as it’s charged when you head out. just test it out for a half day trip and see how much it drains it. My fishfinder actually has a meter that tells me how much of a charge is left on the battery. I actually run 3 batteries 1 for the motor and electronics and 2 for the trolling motor