Replacing starter battery

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blair's picture
blair
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Joined: 2/7/12
Posts: 250
Replacing starter battery

What do you have for a starting battery?

I have a 2004 36MKII with a Universal 35.

My starter battery is a Lifeline AGM group 24 with 800CCA. Great battery, but probably way overkill. I don't believe I need a deep cycle, and I really don't want to spend that kind of money when I can get a lead acid battery non deep cycle for 1/2 that price.

Not really sure if there is much of a difference between batteries, but Interstate seems to have a pretty strong following.

Appreciate any and all constructive advice.

Blair White
2004 C36 MKII # 2169 "Dash"
Pacific Beach, CA

LeslieTroyer's picture
LeslieTroyer
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Joined: 3/13/16
Posts: 533
See expanded reply on FB but deep cycle not necessary, but for longest life keep house and start chemistries the same and adjust charging sources to match.

Les & Trish Troyer
Mahalo 
Everett, WA
1983 C-36 Hull #0094
C-36 MK 1 Technical Editor. 

Commodore

 

Parsons's picture
Parsons
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Joined: 6/2/16
Posts: 95

Very little power is required to start your four-cylinder diesel engine, and you only need that power for 30 seconds max. BTW: having a $100 emergency starting battery, like a Weego, is cheap insurance. Deep Cycle (whatever that means) is unnecessary as you will never discharge that many amp-hours to start any engine.  You need some cold-cranking-amps, but not many.  Here's MaineSail's analysis of battery marketing: https://marinehowto.com/what-is-a-deep-cycle-battery/

If you have not already done so, I suggest looking through MaineSail's excellent site which explains much more about marine electronics, solar, mechanics, and other great stuff than I have ever thought to ask: ​https://marinehowto.com/

John Parsons
"Water Music" 1999 Catalina 36 Mk II - Hull 1771
Tall Rig, Fin Keel
Bay City, MI, USA

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