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Author Topic:   What battery for trolling motor?
Marsh posted 02-13-2004 08:22 PM ET (US)   Profile for Marsh   Send Email to Marsh  
Anyone got a particular marine deep-cycle they recommend for trolling use? The Exide Orbital looks good, as does the Optima gel battery. They supposedly can take up to 350 recharges. They are both sealed, no-maintenance batteries. Both a bit pricey, but I'd rather buy right the first time.

Thanks for comments,

Dick posted 02-14-2004 08:32 PM ET (US)     Profile for Dick  Send Email to Dick     
I just sold my Montauk but my trolling motor battery an Interstate GP27 deep cycle, SRM-27 I believe, was still alive and well after 4 years.
I see no need to waste money on gel cel batteries unless you plan on runnining upside down.
Moe posted 02-14-2004 09:33 PM ET (US)     Profile for Moe  Send Email to Moe     
The Optima and Orbital are not gel cells. They are absorbed glass mat (AGM). Gel can harden and crack over time. Concord Lifelines are another good AGM battery.

I strongly recommend AGM batteries for critical starting applications. They're much stronger than flooded cell types, have a lower internal resistance for less voltage drop during cranking, don't outgas explosive hydrogen or corrosive mist under normal charging, won't leak if tipped, and have a much lower self-discharge.

However, in deep-cycle applications, AGMs don't have the capacity of a GOOD flooded cell battery, like Trojan, which cost a lot less.

My Airstream came with two Interstate SRM-27 batteries, and their capacity, compared to other Group 27s, is notably lacking. Their SRM-27B is better, but not up with Trojan's.


Dick posted 02-15-2004 05:29 PM ET (US)     Profile for Dick  Send Email to Dick     

You are picking the fly shit out of the pepper, AGM/Gel Cell as neither one is up to an acid deep cycle for what the deep cycle was designed for.
Over the years I have sold both Trojan and Interstate batteries. In my experience the Interstate will far outlast a Trojan.


Moe posted 02-15-2004 06:52 PM ET (US)     Profile for Moe  Send Email to Moe     
Dick, all I can say is that if folks look up the specs for themselves, they won't be picking the SRM-27 as a deep-cycle battery. Your personal experience seems to be the opposite of many RVers on several forums.


kglinz posted 02-15-2004 07:18 PM ET (US)     Profile for kglinz  Send Email to kglinz     
Check these out. I run a pair of them for "house batteries" and they are great....
Whalen posted 02-16-2004 01:27 PM ET (US)     Profile for Whalen    
Marsh, The orbital is a AGM, and I test batteries for a living. You would need to use two of these to get the power density of a normal (big 105 Ah) trolling battery. I have 12 optima batteries (starting) that I use to keep Cellular phone sites powered with in case of a power failure while I am testing the bigger site batteries, I have used all kinds of batteries, and I consider the Optima the ultimate starting battery. They keep the voltage up while cranking. Even though I love them for short time high power use, I would not use for trolling (The deep cycle Type).
Marsh, I spent several hours trying to determine the best mounting location for my Minnkota 55AP. It is a bit tricky. Did you mount yours yet?
Marsh posted 02-17-2004 08:24 PM ET (US)     Profile for Marsh  Send Email to Marsh     
Mounted my troller on a quick release, slider plate from Cabela's. I put it on starboard side of bow. Had trouble dealing with bow rail, but finally got perfect site, and can keep bow rail. My troller has grip glide mount, and slides under bow rail. Different style mount would prolly not work due to bow rail interference.

I'll post pics if I ever get home off the road.


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