AGM battery

Submitted: Tuesday, Mar 28, 2006 at 20:18
ThreadID: 32274 Views:3708 Replies:6 FollowUps:5
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hi there,
just wondering if an AGM, deep cycle or standard battery is best for a backup battery. I run a few 12v gizmos, fridge and love my spotties when ever in the dark.

Dont really know a lot of difference when it comes to batteries. I wanted to keep the 2nd battery in the cabin hence the preference for the sealed AGM.

any help would be greatly appreciated.

Cheers
JB
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Reply By: Member - Norm C (QLD) - Tuesday, Mar 28, 2006 at 20:29

Tuesday, Mar 28, 2006 at 20:29
Heaps of info available on atteries if you do a search. If you plan on keeping it the cabin, I'd certainly go the AGM. Also, it sounds like you won't have it connected for charging while driving. If that is correct, it is another big tick for the AGM. They hold charge much better than a standard vented battery.
That's my view.
AnswerID: 163515

Reply By: Member - Mike DID - Tuesday, Mar 28, 2006 at 20:32

Tuesday, Mar 28, 2006 at 20:32
Have a look at this thread
www.exploroz.com/Forum/View.asp?ForumQID=32186

Mike
AnswerID: 163518

Reply By: Derek from Affordable Batteries & Radiators - Tuesday, Mar 28, 2006 at 21:36

Tuesday, Mar 28, 2006 at 21:36
AGM is the way to go, sealed and spill proof.

The other replies also mention the standby qualities of the battery, great.

If dollars allow go AGM.

Regards Derek.
AnswerID: 163540

Reply By: Bilbo - Tuesday, Mar 28, 2006 at 21:45

Tuesday, Mar 28, 2006 at 21:45
Jayse,

Have a look at Optima batteries. They're a military spec AGM, spiral wound DUAL function battery. I've used several of 'em over the last few years in various vehicles. They're very strange shape for a battery.

They are a true deep cycle, sealed AGM with an amazing Cold Cranking Amps (CCA) for their size. Very heat tolerant. I have one ( 2 actually - the other will be my fridge battery) here that's being fitted in to my Nissan Patrol that is currently being converted to a Chev V8 diesel engine. It's smaller than a standard N70ZLL in physical size but has 750 CCA as opposed to around 550 CCA for a N70ZLL, and 870 Max Cranking Amps (MCA). So it's not only a deep cycle for your fridge it's also a darn good cranking battery that's designed for Deep Cycle and Cranking.

But they're not cheap.

Bilbo
AnswerID: 163543

Follow Up By: TerraFirma - Wednesday, Mar 29, 2006 at 12:08

Wednesday, Mar 29, 2006 at 12:08
Which model Optima AGM battery do you use..?
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FollowupID: 418345

Follow Up By: Member - Mike DID - Wednesday, Mar 29, 2006 at 17:04

Wednesday, Mar 29, 2006 at 17:04
Also have a look at "Optima Battery problem" - (PostID: 32219)

Mike
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FollowupID: 418440

Follow Up By: Bilbo - Wednesday, Mar 29, 2006 at 21:59

Wednesday, Mar 29, 2006 at 21:59
Yeah - does look a bit of a mess don't it.

All I can say is that I only ever had one Optima that "rippled" and that was a resullt of a solar panel regulator that went beserk, putting out a full 17.5 volts into the Optima for 2 days before I noticed it!! It got a bit hot but never lifted the pressure vent on the battery.

But even after that it still performed normally. Just the top was slightly "rippled"

Bilbo
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FollowupID: 418531

Follow Up By: Member - Mike DID - Thursday, Mar 30, 2006 at 07:35

Thursday, Mar 30, 2006 at 07:35
I they weren't confusing Odyssey and Optima - BOTH are AGM batteries.

The Odyssey is rectangular and the Optima has rounded corners since it uses the Spiral Cell technology.

Mike
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FollowupID: 418584

Reply By: Sand Man (SA) - Wednesday, Mar 29, 2006 at 15:31

Wednesday, Mar 29, 2006 at 15:31
JB,

As others have recommended, an AGM Deep Cycle Battery is the best to use for the fridge and other 12 volt gizmos.

But, for the spotties, they are better left to run off the primary battery. You would (should) be running the engine whilst using the spots and therefore they don't need to be powered from the auxiliary. This is best left for the fridge and other low drain devices.

Similarly, if you had an electric winch, this should also be powered from the primary battery, where the engine is running while it's being used.
Bill


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AnswerID: 163661

Reply By: TerraFirma - Thursday, Mar 30, 2006 at 13:25

Thursday, Mar 30, 2006 at 13:25
Anyone got any recommendations for who has the best deal in Melbourne for the folowing:

2 x 200-250AH AGM Batteries
2 x 100-105AH AGM Batteries
1 x Xantrex TrueCharge 40i 40amp charger
1 x Xantrex TrueCharger Battery Display Panel \

I say Melbourne because I think the freight from interstate would be a killer. This is going into a boat to replace some smaller Gel batteries and an 8mp charger.
AnswerID: 163875

Follow Up By: Jim Evans - Friday, Mar 31, 2006 at 15:03

Friday, Mar 31, 2006 at 15:03
Try these people.
www.gee-tek.com.au
They are in Geelong (well, Newtown) and their prices seem pretty good. Free freight to Melb Metro too.
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FollowupID: 418930

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