[ausev] AGM batterys

[Bill Gooch]

Joby,

I'm not an expert, but my assessment was that flooded LA batteries  
have a better power-to-weight ratio (higher energy density) than AGM  
batteries.  For example, I'm using Trojan T1275s in my Mr2, which  
weigh 82 pounds each and are rated at 150 amp-hours.  By contrast, the  
Trojan 31-AGM battery weighs 69 pounds and is rated at only 100  
amp-hours.  Some of the other AGM units may be rated higher, but I'm  
comparing Trojan ratings for apples-to-apples.

There are other technical differences that I'm sure the experts here  
can fill you in on.  A practical difference of course is that flooded  
batteries require more maintenance, and I've added single-point  
watering systems to mine to make that easier, and to prevent acid  
spillage.

Gary Ellis has AGM batteries in his Miata, so he can comment on them  
from direct experience.

Bill

Quoting ausev-request at austinev.org:
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 22 Sep 2009 03:27:43 -0700 (PDT)
> From: Joby Wieser <sleeper02_14_06 at yahoo.com>
> Subject: [ausev] AGM batterys
> To: ausev at austinev.org
> Message-ID: <873066.92604.qm at web38803.mail.mud.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> I have read a lot of talk about people here using flooded lead acid  
> batterys, watter miser caps ect.? It looks like my first set of sams  
> club flooded batteries are nearly toast.? I have been reading about  
> AGM batterys and they seem to have many advantages.? Has anyone on  
> the list used them?? Are there drawbacks Im not aware of yet? (aside  
> from the extra cost).
>
> Joby in Fbg