Kayak Batteries for sale

[Fomen]

I just ran a 12v cooling fan on one of the batteries for 24 hours. When I came in this morning, the fan had slowed down a bit, but it was still spinning away. Fan draws .26 amps. So if you have reservations about how long the battery can run your auxiliaries, you need not. I will outlast your day on the water.

When I hooked up my battery charger to recharge it, the charger indicated it still had between 50-75% charge.

[John M]

How long will it run a HDS 5 with GPS?

[Fomen]

Originally Posted by John M

How long will it run a HDS 5 with GPS?

Brother, It will run your FF/GPS all day long. It will also run your bait pump at the same time, ALL DAY LONG! If you're fishing from a Hobie, then you're probably running the bait tank on the 6 volt battery that goes with it. I've heard that the 500 GPH Tsunami bait pump beats the crap out of the bait in the Hobie bait tank if you try to run it on 12 volts. So running it on 6 volts cuts the flow rate down to about 150-200 GPH. I have made a simple electrolytic device with 2, 500 ohm resistors that steps the voltage down to 6 volts. You can run 2 leads from the battery. The lead for the FF/GPS will use 12 volts, and the bait tank can run through the voltage stepper to drop the voltage from 12 to 6 volts. Trust me, 150-200 GPH is more than enough oxygenated water for your small bait tank on your kayak. The device I made is encapsulated in casting resin. It's completely waterproof. If interested in that as well, let me know.

[Fomen]

Here is a picture of the voltage step down device I made. It's a pretty simple electrolytic component. It's basically a couple of resistors in series. Then I encapsulate it in a 2 part casting resin. It's impervious to water. The battery I have it hooked up to is 12.9 VDC. The output of the component is 6.6 VDC.

[alanw]

Originally Posted by Fomen

Here is a picture of the voltage step down device I made. It's a pretty simple electrolytic component. It's basically a couple of resistors in series. Then I encapsulate it in a 2 part casting resin. It's impervious to water. The battery I have it hooked up to is 12.9 VDC. The output of the component is 6.6 VDC.

Sounds like a simple voltage divider. If it is, it's very inefficient and shouldn't be used as a power supply for a load. Every bit of current used by the pump also has to run through a resistor, and all that wasted power is dissipated as heat.

[Fomen]

Originally Posted by alanw

Sounds like a simple voltage divider. If it is, it's very inefficient and shouldn't be used as a power supply for a load. Every bit of current used by the pump also has to run through a resistor, and all that wasted power is dissipated as heat.

It depends on the size of the resistors (actual size, not ohms rating). I used large 500 ohm resistors. But, just to be sure I'll run a load on it. I have a infrared Lazer gun. I'll shoot the temp at the start and every 30 minutes for a couple of hours. Heat is always a byproduct of energy, so I wont be surprised if it heats up a little bit. We'll see what the result is.