Buy New Lead-Acid or AGM Battery

Electrical and electronic topics for small boats
roguewave
Posts: 40
Joined: Tue Mar 01, 2016 11:33 am
Location: Texas/Maine

Buy New Lead-Acid or AGM Battery

Postby roguewave » Mon Sep 12, 2016 9:50 am

I noticed yesterday the [outboard engine on the] boat was cranking slowly after a pounding one-hour ride in the salt. I think I'm just going to replace the marine battery I have in it now (with a 2/2012 purchase date) with an AGM. [Reply with your] thoughts or opinions. Thanks
..."some gave all, KIA"...

Tom Hemphill
Posts: 56
Joined: Fri Oct 16, 2015 5:04 pm

Re: Buy New Lead-Acid or AGM Battery

Postby Tom Hemphill » Mon Sep 12, 2016 12:27 pm

Do you think that yesterday's pounding ride damaged the battery? Whatever the case, your battery was near the end of its expected life. Unless an AGM battery has a much longer lifespan, the other advantages aren't important enough to me to justify the much higher price. (Coincidentally, I just replaced my five-and-a-half-year-old conventional battery yesterday with the same exact model.)

roguewave
Posts: 40
Joined: Tue Mar 01, 2016 11:33 am
Location: Texas/Maine

Re: 17ft Montauk, time for new battery...lead acid or AGM?

Postby roguewave » Mon Sep 12, 2016 1:32 pm

Tom Hemphill wrote:Do you think that yesterday's pounding ride damaged the battery?


It was in the back of my mind. I figured it was near the end of its time.

I ended up buying a NAPA marine fella for $110.
..."some gave all, KIA"...

jimh
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Location: Michigan, Lower Peninsula
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Re: Buy New Lead-Acid or AGM Battery

Postby jimh » Mon Sep 12, 2016 3:08 pm

I am a bit confused by your question of "Lead Acid or AGM". Batteries using absorbed glass mat construction are lead-acid batteries. I think you really want to ask for advice regarding whether to use a flooded-cell vented battery or a sealed valve-regulated absorbed glass mat battery. They are both lead-acid batteries.

roguewave wrote:I ended up buying a NAPA marine fella for $110.


Since you seem to have already made a decision, I think it is too late for advice. What did you get?

Tom Hemphill
Posts: 56
Joined: Fri Oct 16, 2015 5:04 pm

Re: 17ft Montauk, time for new battery...lead acid or AGM?

Postby Tom Hemphill » Tue Sep 13, 2016 8:08 am

roguewave wrote:... I ended up buying a NAPA marine fella for $110.

I also purchased a NAPA battery (BAT 8304 for $120), since the previous one gave good service.