How do you Attach your battery boxs in your kayak?

[ronbo613]

In the ocean, I almost always go thorough surf. Sometimes, I have to roll, carry or go through some difficulties to get the kayak in the water. I transport my kayak upside down on my truck roof rack.
I didn't want the battery to be bouncing around inside the hull, so I made a box out of acrylic and bolted it through the inside of the molded side handle. Completely waterproof and secure, easy to reach though the main hatch. Worth the extra effort to do it.