Noise Filter for Fish Finder

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Since I am setting up a Minn Kota motor on my Toon and I have heard about the electrical noise problems (transient voltage) affecting the fish finder when using the same 12V battery; I have wondered about the possibility of using a good transient noise suppression filter inline with the fish finder rather than having to add the weight and maintenance of a second dedicated battery for the fish finder.

I found a cheap filter that looked like it would do the job, so I just thought I would share the info (have not tried it out yet):

Boss Audio B15N - 12 Amp Automotive Noise Suppressor

[url "https://www.walmart.com/ip/Boss-Audio-B15N-12-Amp-Automotive-Noise-Suppressor/28875652"]Here is a link to the filter:
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