There are a million guides out there for battery boxes for fish finders. I tossed a picture of my setup in a Wickiup report and had an interest. I wanted a box that could be multipurpose, that I could use to run my fish finder or a laptop or as a large powerbank to run a pump for inflatables
DIY Battery Box with Yak Power System for Kayak
Best Kayak Fish Finder Battery – Top 6 Powerful-But-Compact
Hobie Forums • View topic - Depth Finder Battery Holder
Fits standard 12V-7AH / 9AH Batteries with dimenssions of 5.9 x 2.6 x 3.7 Inches with male spade Terminals.(Battery not included) Single Waterproof
Elephant B095S2 Kayak Battery Box Waterproof Battery Enclosure for Powering GPS, Fish Finders, Led Lights, Aerator Pump (2 Pin Single)
PowerBox Green 12v Ice Fishing Outdoors Kayak Fish Finder fits
Kayak Fishing Blog Cornish Kayak Angler - KAYAK FISHING BLOG
DIY Kayak Battery Box
Depthfinder installation on kayaks just got smarter. The YakAttack CellBlok is a track mounted battery box and its top surface serves as a mounting platform for the display and transducer deployment arm. No more drilling holes in your kayak or routing wires! Simply loosen the two track mount knobs and the CellBlok allows you to quickly and easily attach or remove your depthfinder. A minimum of 10.5 of track is required to attach the CellBlok.
YakAttack CellBlok
Kayak Fishing Blog Cornish Kayak Angler - KAYAK FISHING BLOG
Portable Fish Finder - fishing post - Imgur
Best Kayak Fish Finder Battery – Top 6 Powerful-But-Compact