>>>>>I bought a yellow-top optima gel cell from les schwab in Orchards
>>>>>Washington. They highly recommended it and so did everyone else I talked to
[quoted text clipped - 32 lines]
>
>That's the definition of 'deep discharge'.
Yes I have, many times, and that is not DEAP DISCHARGE, it is HIGH
AMPERAGE DRAW. Two different things.
Does an early hemi meet the description? A cloud within 50 miles and
all that? Deep Cycle batteries like the YellowTop are designed for low
to medium draw over an extended period. SLA batteries like the red top
are designed to punch out HUGE umbers of amps for a short time, using
less than half of the available power capacity.
Using a deep cycle battery for SLA (Starting,Lighting and Accessory)
use is misusing the battery, as is using an SLA battery for deep cycle
use.

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News - 08 Aug 2007 01:19 GMT
>>>>>>I bought a yellow-top optima gel cell from les schwab in Orchards
>>>>>>Washington. They highly recommended it and so did everyone else I talked to
[quoted text clipped - 35 lines]
> Yes I have, many times, and that is not DEAP DISCHARGE, it is HIGH
> AMPERAGE DRAW. Two different things.
High amperage draw down times long duration equals deep discharge.
clare at snyder.on.ca - 08 Aug 2007 02:40 GMT
>>>>>>>I bought a yellow-top optima gel cell from les schwab in Orchards
>>>>>>>Washington. They highly recommended it and so did everyone else I talked to
[quoted text clipped - 37 lines]
>
>High amperage draw down times long duration equals deep discharge.
True, but the high amperage draw is the key - DEEP DISCHARGE BATTERIES
ARE NOT DESIGNED FOR HIGH AMPERAGE DRAW. This is a FACT.
200 amp hour deep discharge battery will provide something like 8
hours at 20 amps for an 80% DOD, time after time with no damage, but
200 amps for 20 minutes will kill them dead - permanently after a few
times.Never mind trying to pull 400 amps for as little as 7 minutes.(
only 25% DOD)or 800 amps for 3 or 4.
An equivalent SLA bvattery may be rated at 800 CCA and provide 800
amps for 7 minutes, or 400 amps for 10 minutes or 200 amps for 20
minutes without serious harm (if immediately recharged), with a DOD of
less than 50%.
The internal resistance of the SLA battery is a lot lower, and all
around it is deisigned for high power output, while the DD is designed
to be drained slowly over and over.
Diofferent ponies for different tracks.

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