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Fish finder battery packs (any one use Lithium-Ion packs?)


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#1 nfnDrum

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Posted May 26 2011 - 11:19 PM

I currently use a AA battery pack which i have no problem with it lasts multiple trips as long as the back light is kept low or off. I like the idea of not having a large 12V battery on board. Any one ever hook up a Lithium-ion pack? Going to check the specs on the finder to see what it calls for. I don't want to fry the unit.


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#2 nfnDrum

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Posted May 27 2011 - 12:06 AM

Found an old thread online stating Li-ion is a bad idea ... things have changed in 5 years any thoughts?


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#3 hertzy

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Posted May 27 2011 - 5:04 AM

Not the ion packs, but i use three 9.6 volt ni-cd rechargeable batteries from my kids old RC cars. Used it for a solid 4hours last weekend. I wanted to check the voltage when I got home, but forgot and plugged it in. Plan on heading out this weekend, so I'll check it again. So far It's lasted. If there is any interest, I can post a pic or two.

Just another option for ya.


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#4 cfish

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Posted May 27 2011 - 5:24 AM

Any decent size battery can go off like a bomb if it's short circuited or overcharged, it sounds like a very bad idea to use these in a marine environment.


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#5 nfnDrum

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Posted May 27 2011 - 10:37 AM

Thanks for your input .... The RC car batteries aren't a bad idea i looked into 12V packs the price seems to be comparable too AAs with more mAH.

Anyone know if the mAH increases once AAs are linked so i'm useing the right numbers to compare.

My finder runs 200 mAH with no back light and 250 with it on ... they make 12v packs from 2000 - 4200mAH


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#6 hertzy

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Posted May 27 2011 - 3:44 PM

Any decent size battery can go off like a bomb if it's short circuited or overcharged, it sounds like a very bad idea to use these in a marine environment.


I have said how I have them wired. All three are wired in parallel "all the red wires together, and all the black wires together". If you try to wire them in series, they will heat up and melt the wires, or explode! the charger that came with the RC car is a 5 hour charger. After a single 5 hour charge, I get 12 volts at the plug. I don't go into salt water with my yak, so I will have no issues with it. If you do, I would put it into a sealed box.


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#7 dena

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Posted May 27 2011 - 4:26 PM

I use a Ni-Cad 12V cordless drill battery sealed in a tupperware container.
Works for me.


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#8 malibuX

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Posted May 28 2011 - 8:31 PM

I use a Cabelas sealed 12v battery in a waterproof box. Never had a problem; I use a 1Amp in-line fuse in the box. It lasts for several days without a re-charge.


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