I know this has probably....

been asked a million times.

What is the best battery for my kayak to run my graph from. I have a Helix 9 SI GPS combo on a Hobie PA 12'.

I have been using the small 12v deer feeder battery and it will last all day just not for long and then I have to get another one about every other month....

There has to be something better right? I'm not wanting to take on a full size deep cycle marine battery.

I use a 15 ah Interstate AGM battery. Not cheap, but it'll do what you need it to.

I just got a 10mh Lithium battery yesterday. But I haven’t got to try it yet. It’s very small and lightweight.
NOCQUA
The link is to Austin Kayak, but Mariners Sails in Dallas has them for a lot cheaper!

I have the nocqua 10ah battery and it powers my hds 7 G2 touch for 17 hours. It's the size of a large apple, waterproof and weighs about a pound. You won't find a better battery.

I'm running a 30 amp Hr LiFePo4 (Lithium), problem solved.

Thanks for all the replies. I went with the nocqua 10ah battery.

After you get it installed and have a chance to run it, would you mind letting me know how long one charge last?
I’ll be using mine for the first time this weekend.

PS. Are you still selling fish finders? I bought a 998 from you many years ago!

Is your unit a MEGA?

I hate to say it but you probably just wasted your money. You'll kill that battery too.

Most people just want to hear "I use the BENFORD 2000 and it works great" but they don't realize that guy is using a FF that draws .4-.7 amps and yours draws 1.0 amps so you won't get the same run time and will kill the battery by trying to go 10 hours on it. Getting the "CORRECT" size battery and not running below 80% will greatly increase the life out of them.

This ^^^^^^^^^^^^

Todd did I make a mistake getting the battery I got?

No Gen1 Helix on the Yak.

Yes I am still selling electronics....

Good to see u yakin. U gave me ur old Toro a few years back.

Interested in this topic, how do you determine the correct size?

You need to total your total load (amp draw) and how many hours you want to run.

Amp Load x run time x 1.5. This will get you in the ball park. Always over size your batt by at least 50%.

This^ It would be great if they could put a sticky post on this subject in the rigging section.

It appears too small also. Yours appears to be rated at .8 amp draw. That's probably max and will run slightly lower but that's the number I use. A good lithium battery setup will have a safety shut off to keep it from dropping below critical voltage. Yours probably has one so I don't think you will get many hours out of it before it shuts down. Not an entire tournament day.

You could buy another one and wire them parallel to double the amp hour.