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Old 15 February 2014, 14:17   #1
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Suitable fish finder battery?

Looking for some advice on a suitable battery for a Garmin 300 colour fish finder.
Don't want to spend a fortune on a lithium battery, just a suitable fairly compact sealed battery that will see me through a weekend's fishing.
Any ideas greatly appreciated!
I had been using a Deben 20amp/hr battery which I use for lamping foxes.
It's a bit big and bulky - but did see me through 6 straight days of fishing without recharging.
Thanks in advance.
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Old 15 February 2014, 16:42   #2
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As you have it to use, I'd connect it up but with a multimeter in series to the +12V... set to the DC Amps setting. Get it running steady and read the number of amps its pulling (the manual reads like it'll be 1amp but I suspect its less than that an 1amp is a nice round number).

Multiply the steady amps x number of hours you want to run the boat for. Lets say 6hrs per day for 2 days - so 12. So you might get 12Ah.

A battery should never be run below 40% so you divide the 12Ah by 0.6 --> 20Ah battery. Something leisure like rather than engine cranking would be best.

Does you engine not have a power output that can top up a lower Ah battery?
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Old 15 February 2014, 16:45   #3
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Quote:
Originally Posted by kaman View Post
Looking for some advice on a suitable battery for a Garmin 300 colour fish finder.
Don't want to spend a fortune on a lithium battery, just a suitable fairly compact sealed battery that will see me through a weekend's fishing.
Any ideas greatly appreciated!
I had been using a Deben 20amp/hr battery which I use for lamping foxes.
It's a bit big and bulky - but did see me through 6 straight days of fishing without recharging.
Thanks in advance.
I used one of these on a small sib once to run my fish finder a full charge would last the weekend.....http://www.tacklebox.co.uk/batteries...volt-7amp.html
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Old 15 February 2014, 17:11   #4
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The Deben 20 is a good battery. I use them too.


If its not giving you what you need then I'd be going to halfords and getting a small car battery.
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Old 15 February 2014, 17:35   #5
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I use a yucel 7 AH battery from maplins, it lasts a couple of days with my Lowrance. I just trickle charge it with an old 12V phone? charger.


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Old 15 February 2014, 20:05   #6
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I use a yucel 7 AH battery from maplins, it lasts a couple of days with my Lowrance. I just trickle charge it with an old 12V phone? charger.
That looks just the ticket.

Don't want a big bulky number!

I will look into it to see if 7AH is sufficient for my needs, cheers!
That well known internet site is full of battery options!
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Old 16 February 2014, 09:54   #7
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got one of the above if you want it just pay P+P Click image for larger version

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Old 16 February 2014, 10:23   #8
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got one of the above if you want it just pay P+P
That's most kind!
I will PM you shortly to sort out covering the cost of P&P.
Thanks you very much.
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Old 16 February 2014, 11:43   #9
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your welcome
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Old 16 February 2014, 20:38   #10
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If that fall through, a lawn and garden battery works fine (used to run 2 handhelds, plus starting a 40hp 4-stroke.)

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