TheAutumnWind
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What do you use for the side terminal posts? I am not totally happy with mine.
GMT800 Second Battery Underhood
- Thread starter Madgrty
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TheAutumnWind
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Fits fine. Did you see my other thread? There are pics in there. You do have to remove the crescent shaped hood brace though. No battery will fit in there with that bracket in place.
No issues at all with the top terminals. There's actually quite a bit of room under the hood above the battery.
EDIT: Here's the pic of the 2nd battery:
Martinjmpr
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Extended side terminal bolts from Advance. I think these were the ones:
http://shop.advanceautoparts.com/p/.../6280501-P?searchTerm=extended+terminal+bolts
TheAutumnWind
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I like those better than the ones that I have from autozone thanks
Thanks for the pic. couldn't see it at work but can at home. Friggin gestapos. x2 still showing available here too on the site, until you get to the store, just super concerned about the supposed returns. And with the dual battery setup, it's best to have the same battery for charging purposes.
Martinjmpr
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I believe that's only true if you're not using an isolator. Where two batteries are connected in parallel with no isolator (basically making two smaller batteries into one big battery) it's best if the batteries are as similar as possible. I've even heard people say you should buy them at the same time and place so you can get batteries that were manufactured as identically as possible.
OTOH when using an isolator it's really two separate batteries because as soon as the ignition is switched off the batteries are no longer connected. For purposes of charging, it makes sense that both batteries be of the same type (FLA, SLA, AGM or Gel) because different types of batteries have different charging rates but it's not necessary that they be the same model or amp hour rating.
Over on Expedition Portal (http://www.expeditionportal.com) dual batteries are pretty common, mostly for people like me who run refrigerators while we are on extended camping trips (the fridge is awesome because it keeps food cold without having to constantly run into town to get ice for the cooler. Also, no soggy food from melting ice.)
So of course this being the internet, I've read conflicting things on this and of course they all seem to hold some merit. I think the batteries don't really make a difference for smarter isolators that keep the batteries completely separate even during usage. These work by charging the starting battery first, and once it's topped off, the charging moves over to the second battery. The isolator you have (and I've purchased as well) are more of a relay that isolates only when switched off, but then parrallel's them when switch on. The reason you'd want them to be the same is as you noted, for charging. The reason you want them to be the same is so that you're not overcharging one of the batteries while the system tries to get a full charge to the larger capacity battery. There's a good change you'll do some damage to the smaller battery doing it with off-sized batteries.
That said, I'm by no means an expert here, but this info makes sense to me, and why I'd personally only run two like batteries with this type of relay/isolator.
