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Discussion Starter #1
Yesterday I went to the local batery distributor to pick up a Trojan T105 or
T125
to use to assess size and fit in a vw-basd kit car (Porsche 356, by my count
7 different people make them, I found an older one locally fairly cheap),
and they, having no pure interest in either battery (they sell
both) preached to me the virtues of the Discover dry cell (agm).
The chief virtues are the following:

- no acid (esp since 10 will sitting in the interior compartment (we'll have
adequate bracing/protection);
- no hydrogen gasing
- no acid spray
- costs about 2x ($325 ish vs $170 ish) as much, but last 2 - 2.5x as long

and they seem to have pretty decent performance characteristics (124 minutes
rc at 75 vs 115 for Trojans, I think)
so it just seems to be a matter of buying 4-6 yrs. worth of batteries up
front vs. 2-3. (??)

I had initially shied away from Discover when I heard they were
essentially agm, meaning in my mind
200-300 cycles before going kaput, but it looks like they are more like
1000-1100 cycles at 50% dod
(compare vs Trojan's specs of 438 cycles T105, 492 cycles for T125).
However, the (NE Ohio) distrobutor (Haris Battery) said someone from around
these here parts had put a bunch in a Ranger / pickup ev and swore by them
...
Could these be the missing link between present day lead acids and the
battery ofthe future (whether firefly or lithium)? I recall Firefly said
their lead acid battery would end up being something like 5x in price a
regualr lead acid, so since this is just 2x, these seem like a midway step
in the firefly direction ...
They also said Zenn is using Discover (?), and Myers Motors is planning
on using them too

Seth Myers

(I suppose I should look up old ev archives for discover info, but htat
seems quite time intensive)


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Discussion Starter #2
Hi Seth,

I am also interested in any info on Discover batteries
anyone here can offer. Just in the past week, I have
had 2 cold calls from Harris battery salesmen.

http://www.harrisbattery.com/

They really talk up the Discover battery. Claim 50%
better than Optima. Sounds like hype to me. The one
guy went on for 30 to 40 minutes. I told him to send
me one and I'd test it. That shut the guy up. Oh
well.

Price they gave me for 16 T125 size batteries for my
Jeep was in the $250 range each. Then they said I'd
do better using the 8 or 12 volt versions. Better
performance at lower cost. Go figure.

Guess I just don't trust battery salesmen.

Regards,

Jeff M

Oh yeah, I did a quick look in the archives. Didn't
see anything.

--- Seth Myers <[email protected]> wrote:

> Yesterday I went to the local batery distributor to
> pick up a Trojan T105 or
> T125
> to use to assess size and fit in a vw-basd kit car
> (Porsche 356, by my count
> 7 different people make them, I found an older one
> locally fairly cheap),
> and they, having no pure interest in either battery
> (they sell
> both) preached to me the virtues of the Discover dry
> cell (agm).
> The chief virtues are the following:
>
> - no acid (esp since 10 will sitting in the interior
> compartment (we'll have
> adequate bracing/protection);
> - no hydrogen gasing
> - no acid spray
> - costs about 2x ($325 ish vs $170 ish) as much, but
> last 2 - 2.5x as long
>
> and they seem to have pretty decent performance
> characteristics (124 minutes
> rc at 75 vs 115 for Trojans, I think)
> so it just seems to be a matter of buying 4-6 yrs.
> worth of batteries up
> front vs. 2-3. (??)
>
> I had initially shied away from Discover when I
> heard they were
> essentially agm, meaning in my mind
> 200-300 cycles before going kaput, but it looks like
> they are more like
> 1000-1100 cycles at 50% dod
> (compare vs Trojan's specs of 438 cycles T105, 492
> cycles for T125).
> However, the (NE Ohio) distrobutor (Haris Battery)
> said someone from around
> these here parts had put a bunch in a Ranger /
> pickup ev and swore by them
> ...
> Could these be the missing link between present
> day lead acids and the
> battery ofthe future (whether firefly or lithium)?
> I recall Firefly said
> their lead acid battery would end up being something
> like 5x in price a
> regualr lead acid, so since this is just 2x, these
> seem like a midway step
> in the firefly direction ...
> They also said Zenn is using Discover (?), and
> Myers Motors is planning
> on using them too
>
> Seth Myers
>
> (I suppose I should look up old ev archives for
> discover info, but htat
> seems quite time intensive)
>


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Discussion Starter #3
On 1 Dec 2007 at 8:42, Seth Myers wrote:

> Discover dry cell (agm) ...
> Could these be the missing link between present day lead acids and the
> battery ofthe future (whether firefly or lithium)?

Lessee, where's Lee Hart's quotation? Ah, here it is. "There are three
kinds of liars : liars, damn liars, and battery salesmen."

David Roden - Akron, Ohio, USA
EVDL Administrator

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