This new Electronics Battery Box will accommodate a large 12v 12Ah sealed battery.  Before drilling holes in a dry box make sure your box will fit through the hatch on your kayak.

Dimensions of the battery

Length 5.94 inches

Width 3.86 inches

Height 3.74 inches

Weight 7.95 lbs

You can find these batteries new on ebay for $20 – $30. The higher amp hour is good for running fish finder chart plotter combos with color screens. These use a higher amount of amps than the black & white units the 7.5 Ah batteries just don’t perform as well for a full day of fishing.

List of Materials:

• 1 Battery as mentioned above $23.00 ebay
• 1 Dry box that will accommodate the size of the battery $23.00 ebay
• 1 Small Cable Gland $1.00
• 1  Wire with inline waterproof connector (4 wire 4 pin) Possible future lighting or other accessories $4.80 Amazon
• 2 inline heat shrink inline wire crimp connectors
• 1 3″ piece of adhesive 1/2″ heat shrink tubing

Tools:

• Drill
• Heat Gun
• Wire Crimps/Strippers
• Drill bits/ Step Drill Bit

Install: 

Using pipe insulation fit the battery to the box. This will hold the battery in place so it doesn’t bounce around. Next drill a pilot hole using a 1/8″ drill bit. This will be the location of the cable penetration. You can pick pretty much any side. I would say avoid the top the bottom and the back. In this install I opted for the front under the handle. Once the pilot hole is drilled use the step drill bit to ream out the hole until the cable gland will thread in.

Once the cable gland is installed slide the cable with the connector through from the exterior. You will now pick 2 wires from the 4 to pair.  Use the two inline heat shrink connectors Crimp and heat the one side to seal. Now slide over the 3 inch piece of adhesive heat shrink tube. Connect the inline fuse wire and the ground wire. Attach the terminal ends and your DIY waterproof electronics battery box is complete.

Waterproof Battery Box Modifications & Upgrades <— Click for updated post!!!!