Auxillary Battery

Submitted: Tuesday, May 16, 2006 at 17:47
ThreadID: 33946 Views:1837 Replies:5 FollowUps:3
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Im about to replace my second battery and are wondering whats the best type to go for? Whats the benifit of deep cell and how much dearer are they?

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Reply By: boo boo - Tuesday, May 16, 2006 at 18:11

Tuesday, May 16, 2006 at 18:11
I replaced mine with an 85amp deep cycle marine battery it seems to work ok, but as they say you should only flatten then 50%. the AGM battery will allow you to flatten it 80%. Neither battery is cheap but go for the best you can afford
AnswerID: 172980

Follow Up By: Member - Ian H (NSW) - Tuesday, May 16, 2006 at 20:26

Tuesday, May 16, 2006 at 20:26
Be aware, the AGM batteries should only be charged at a max of 27 amps according to the rep at Supercrank batteries.
I just fitted a Rocket Deep Cycle battery, funny name but made by Global Yuasa. Cost $275 incl GST. 85 amp/hr. Hope it keeps the beer cold in the fridge.
FollowupID: 428729

Follow Up By: Alloy c/t - Thursday, May 18, 2006 at 17:01

Thursday, May 18, 2006 at 17:01
Ian H ,, next time you see your supercrank battery rep tell him /her that he /she /it dont know sh-t from clay , AGM batts will take whatever amps you throw at them ,VOLTS are a different story however. !!!
FollowupID: 429300

Follow Up By: Member - Jeff M (WA) - Thursday, May 18, 2006 at 17:58

Thursday, May 18, 2006 at 17:58
Yeah it's a amzing what some so called "professionals" will tell you.

I had the OWNER of battery world in Joondalup trying to tell me that a 14.2v charger will be fine for my Calcium-Calicum battery because "well he only sells them for a living".

He also told me that the "Battery fighter" only charges at 14.2v when on their spec sheet it says 14.5v!

But I guess he knows what he's talking about because "he sells them for a living"....

I'm sure the 16 year old at Kmart sells TV's for a living too...
FollowupID: 429317

Reply By: Max - Sydney - Tuesday, May 16, 2006 at 18:30

Tuesday, May 16, 2006 at 18:30

I have had a couple of Federal deep cycle batteries in the car, and unless this one lasts more than about 2 years, I am going to use a Marine battery next time. It might actually do better, as I have put a relay on the caravan fridge circuit so it won't run when the engine is not running. That should stop serious excess discharge.

But the van has a marine one and is approaching 2 years and it has done well.

Blowed if I know!

AnswerID: 172986

Reply By: Derek from Affordable Batteries & Radiators - Wednesday, May 17, 2006 at 06:58

Wednesday, May 17, 2006 at 06:58
Hi Hairy

AGM is the way to go. Look after it and it will give you many years service. If you are using a fully automatic controller like the Redarc or ABR Bi-80 or Bi-200 the AGM will charge fine.

Regards Derek.
AnswerID: 173072

Reply By: Member - Jeff M (WA) - Wednesday, May 17, 2006 at 20:03

Wednesday, May 17, 2006 at 20:03
I'm now running 2 x 105 amp/hr calcium-calcium deep cycles. Cost about $120 each so you can get two for the price of one 100amp trojan!

The only down side is they don't charge to 100% of the alternator as they require a higher voltage (14.7-8v) to get to 100%. I solved this problem by installing a Hella plug in the front grill and connect the vehicle to a 3 stage charger when it's parked up. Of course who needs 100% of 210amp/hr for you're normal camping trip anyway, 80% is just fine! :-)))

I use a Century/Yussa 700cca cranker for starting her up.

AnswerID: 173197

Reply By: Member - Mike DID - Thursday, May 18, 2006 at 10:46

Thursday, May 18, 2006 at 10:46
If you look at the Manufacturers Data sheets from Remco or Absorbed Power AGM batteries, you will see that even if you discharge them to 0% capacity remaining (not 0 volts !) EVERY day, then even after a year, a 100 amp hour battery will still be able to supply 60 amphours.

AnswerID: 173318

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