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best replacement batteries? #18173
03/08/19 09:49 AM
03/08/19 09:49 AM
Joined: Jul 2018
Posts: 72
Burton, Michigan
N
nathankt79 Offline OP
Senior Member
nathankt79  Offline OP
Senior Member
N
Joined: Jul 2018
Posts: 72
Burton, Michigan
Good morning all,

At the end of the season last year, I came to the conclusion that it is time to replace the batteries in Conundrum. Can everyone chime in on what type or brand of battery they like the best? I'm not sure if I should go lighter, gel cell, some other direction, or just go with a tried and true sealed, lead acid battery. What are everyone's thoughts?

Thanks,

Nate

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Re: best replacement batteries? [Re: nathankt79] #18174
03/08/19 12:35 PM
03/08/19 12:35 PM
Joined: Sep 2000
Posts: 368
Rockwood, MI, USA
Russ Atkinson Offline
Senior Member
Russ Atkinson  Offline
Senior Member
Joined: Sep 2000
Posts: 368
Rockwood, MI, USA
I have 2 conventional lead acid batteries. Both identical marine deep cycle form Interstate.
I do not have a battery charger on board other than the alternator on the engine.
I run off the front battery all season - only switch to the back battery on over night races and only after the instruments tell me battery power is low (they stop working)
I bring them home in the winter and charge them before putting them on a shelf. I charge them again before putting them back in the boat in the spring. Batteries last about 10 years

Re: best replacement batteries? [Re: nathankt79] #18175
03/08/19 07:00 PM
03/08/19 07:00 PM
Joined: May 2007
Posts: 2,592
Portsmouth, RI
Rhapsody #348 Offline
Past J/30 Class President
Rhapsody #348  Offline
Past J/30 Class President
Joined: May 2007
Posts: 2,592
Portsmouth, RI
When I had Rhapsody I bought two Group 24 sealed Lead Acid batteries from Walmart for $70 each. I replaced them after 7 years, because I thought it was a good idea, not that there was a sign they were loosing capacity. I had a Xantrex smart charger (Dual 10 amp) that was connected on the dock. When I sailed the boat I used battery 1 on odd days and battery 2 on even days to get equal usage out of them. Similar to Russ when night sailing I swapped to the other battery and started the engine to charge (then battery switch placed on all).

I left the batteries on the boat in the winter but stopped by once a month to top them off with the battery charger. If the batteries discharge the electrolyte will freeze and crack the case.

Re: best replacement batteries? [Re: nathankt79] #18176
03/11/19 05:55 PM
03/11/19 05:55 PM
Joined: Jun 2000
Posts: 115
Melbourne, FL, USA
Rob Van Name Offline
Senior Member
Rob Van Name  Offline
Senior Member
Joined: Jun 2000
Posts: 115
Melbourne, FL, USA
I bought two Duracell AGM group 24 batteries from Batteries+ for about $198 each. The Optima yellow top batteries lasted about 8 years. Life on a trickle charger is good.

Last edited by Rob Van Name; 03/11/19 07:31 PM.
Re: best replacement batteries? [Re: nathankt79] #18179
03/14/19 08:24 PM
03/14/19 08:24 PM
Joined: Jan 2013
Posts: 49
Westerly, RI
Chris623 Offline
Senior Member
Chris623  Offline
Senior Member
Joined: Jan 2013
Posts: 49
Westerly, RI
My suggestion would be 2 AGM batteries, but at a minimum would stay away from batteries marketed as marine starting or even marine dual purpose as those batteries are really only needed with very large engines. (Ref: Pbase-MarineHowTo)

One of the best IMO is Odyssey Battery which used to be available as Sears DieHard Platinum. Odyssey states a 3-10 year service life. As I am on year 13 on the battery I use most often, I'll be sure to eventually replace it with the same.


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