Thread: Lithium Batteries?

I bought an AGM battery 2 years ago and now it's dropping down to under 12 volts with only after only an hour of fishing. So while checking the battery, I decided to check my battery charger. No voltage output from the leads to the cranking battery. Just great, had to order a new charger but I did run the boat quite a bit after turning all electronics off Saturday so the battery shows fully charged on my load tester. Here's the deal... I can fish for one hour with my LS, Helix 10 and Solix 12 on and the voltage on the batteries drops down below 12 volts. These are the exact same issues I had with the lead acid battery that I replaced with the current AGM.

On the load tester that I have you are supposed to hold the switch down for 10 seconds. That engages a heating element of sorts. It got hot and the batteries amps didn't drop. I then waited about 30 seconds and load tested it again. This time I held the switch engaged for about 20 seconds. The element was glowing red. It looked like a branding iron. The amperage didn't drop.

So, if my battery load tests good, why is it draining so fast?

If my battery is bad, I'm considering replacing it with a Lithium. If any of you are running Lithium batteries, how large would I need to power the 3 afore mentioned units and crank my battery? I'm either going to do that, or replace it with a cheap Lead Acid battery and just swap them every year.

Have you checked for any parasitic amp draw? Just a thought

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What is the total amp draw from your 2 fish findwer units. Sounds like something is drawimg more power than it is supposed to be.

I have not checked that yet, but plan to do so tomorrow since I have all the wires disconnected. I'm going to ohm each wire to see if there's a short to the hull.

I can wire a boat, but I'm no electrician. How do I check for amp draw? I have a clamp on meter so I can use that if all you do to check that is just hook it around the battery cable to see if anything is pulling power while everything is off.

125ah ionic. Give this man a call. He will answer all your questions. IONIC LITHIUM BATTERIES FOR BASS BOATS - Drewcraft LLC
You can get a 100ah but for 78 more dollars get the 125ah. Whatever lithium battery you go with, make sure it's deep cycle.
Don't know about the amp thingy........

Originally Posted by tlefire

125ah ionic. Give this man a call. He will answer all your questions. IONIC LITHIUM BATTERIES FOR BASS BOATS - Drewcraft LLC
You can get a 100ah but for 78 more dollars get the 125ah. Whatever lithium battery you go with, make sure it's deep cycle.
Don't know about the amp thingy........

Is that what you're running?

Originally Posted by FurFlyin

Is that what you're running?

Yes. 2 for the troller and a 50ah for electronics.

Originally Posted by tlefire

Yes. 2 for the troller and a 50ah for electronics.

but not for cranking?

Originally Posted by FurFlyin

but not for cranking?

I don't have your kind of money...lol

When my cranking battery goes bad, I'll have one.

Originally Posted by tlefire

I don't have your kind of money...lol

When my cranking battery goes bad, I'll have one.