Deep Cycle Boat Battery

[Blue Oval]

I have 10 year old Duralasts in my 29 PQ, never had a problem. I know to replace them this year, running on borrowed time. Local Car Quest priced there battery to replace them, built by Interstate, not a real fan of the Interstate battery. 800amp,110ca, any suggestions.

[Uncle Dave]

Odyssey AGM batteries or an equivalent AGM.

I prefer regular lead acids (interstate, sears etc.) to optimas (gel)

I have-just had really bad luck with all color optimas.

I like AGM types the best of the three.

UD

[Chris]

Odyssey makes a good battery. I have also had bad luck with the Optima in marine applications. In our trucks they've performed well.

[DollaBill]

regulare batt's get changed every year. Gels every 2 years. I don't care how perfect they are.

[MarylandMark]

I had quite a few issues with my Optimas the last 3 years. I had a faulty alternator on one motor so that may have been part of it but I kept them on a regulated battery charger most of the time.

Going on my 4th season- 1st issue and replacing all 4 of them. They are fancy looking with the blue tops!

[Blue Oval]

Beer drinking buddy told me to put one deep cycle in, and a standard marine battery for cranking. I have had two deep cycles for 10 years, that one threw me for a loop.

[JupiterSunsation]

Had an Optima go bad in 11 months on a Whaler (previous owner bought it). They replaced it under warranty but they shipped me the battery, couldn't return it through a local store. It literally runs the boat motor and nav. lights, no other options on the boat. I would never pay $200-300 for a battery no matter what the virtues are!

[MarylandMark]

Beer drinking buddy told me to put one deep cycle in, and a standard marine battery for cranking. I have had two deep cycles for 10 years, that one threw me for a loop.

From Merc Racing:

Should my boat be rigged with a starting or a deep cycle battery, and why?

There is a difference between an ordinary starting battery and a Deep-Cycle battery. Starting requires a high amount of energy for a short period of time (about 30 seconds maximum). Only a small amount of the battery's capacity is used. Once the engine starts running, the battery is recharged quickly by the charging system.

A Deep-Cycle battery supplies a relatively low amount of current for a long duration. Deep-Cycle batteries, unlike starting batteries, can be run down and recharged repeatedly with minimum loss of capacity. Deep-Cycle batteries are designed to power electric fishing motors, and other electrical accessories in boats and recreational vehicles such as radios, TVs, fans, etc.

Since starting batteries and Deep-Cycle batteries are designed for different purposes, they are constructed differently inside. Starting batteries have porous active material. The plates are thin and are designed so the high-amp energy can be quickly delivered for maximum starting power. Repeated cycling, which involves lower capacity drains and recharges, weakens the positive plate. The active material drops from the grid, thus, in repeated deep discharge/recharge applications, the capacity of the starting battery drops below desired levels in about 50 cycles.

The Deep-Cycle battery has a denser active material and thicker plates to withstand deep discharge/re-charge service.

That being said- most marine batteries these days are dual purpose starting and deep cycle.

[Trim'd Up]

I have had terrible luck with optimas in boats and jeeps. I wouldn't trade a cheap wally world max start for an optima.

[TCEd]

I've had excellent service with the Cosco batteries; Kirkland brand.

[MarylandMark]

Ut-o...

After bad mouthing Optima for a while, I found out I have Optima 34M's which are start batteries, not deep cycle. I had someone check them out for me but never did so on my own. This was the 1st year I ever had them taken out, since new 3 years ago I left them in the boat all Winter with the charger pulled in most of the time (charger regulates charge, not an old style overcharger).

I may or may not have had an alternator go bad because of this, apparently that is one of the things having the wrong batteries does.

Just ordered 4 Sears Platinum PM-2 34M's. These 34M's meet Mercurys standards, the Optima 34M's do NOT, only the 31M's do.

[Blue Oval]

Thanks for the info, I will roll the dice and see what happens

[Wrinkleface]

Thanks for the info, I will roll the dice and see what happens

Where, at Odawa?????

[MarylandMark]

FYI-

Sears is having a "Friends & Family" event this Sunday.

$199 reg price, on sale for $189, then 10% off and then another 10% off or some thing along those lines. $650ish for 4 of them or about $200 savings. Buy 3, get one free!

http://www.sears.com/shc/s/p_10153_1..._sears_reviews

[Knot 4 Me]

Interstate XHD-24 marine cranking. 800 CCA/1000 MCA. Just bought 2 for $170 out the door. My last set lasted 5 seasons and are still strong but I'm not taking a chance for under $200. I would not mix starting and deep cycle if the only charging source is the alternator. If you need deep cycles for a big stereo, etc., isolate it with its own charger.

[mustang]

I would go with the Sam's Club or Walmart batteries. My girlfriend used to work for Johnson Controls in their battery division. From the same plant they would make batteries for Walmart, DieHard and Interstate. She said the only real difference was the label. They were all filled from the same acid tank.

[phragle]

West Marines batteries..don't know nationally, but locally they buy Penn batteries from battery wholesale, then slap their sticker on them and double the price.

[rchevelle71]

I would go with the Sam's Club or Walmart batteries. My girlfriend used to work for Johnson Controls in their battery division. From the same plant they would make batteries for Walmart, DieHard and Interstate. She said the only real difference was the label. They were all filled from the same acid tank.

I agree, I proudly run Wal-mart batteries in everything I own

[phragle]

Wally world does have some decent batteries, don't know about the marine ones but their yellow extreme duty auto ones really impressed me.

[Blue Oval]

Tried a couple Motocraft 880 Dual purpose Marine Deep Cyle Batteries, will let you know how they work out!