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Posted by mlw on June 13, 2005, 10:38 am
The Artist Formerly Known as Kap'n Salty wrote:
> mlw wrote:
>> The Artist Formerly Known as Kap'n Salty wrote:
>>
>>
>> What is "true" deep cycle? Some batteries will cycle deeper and more
>> often than others, but that does not mean other batteries are not "deep
>> cycle." There are many SUV vehicals, and some are better than others, but
>> that does not mean the others are not SUVs.
>
> As I said, the term is somewhat malleable -- but I have read that a
> "true" deep cycle battery is suitable for regular motive use (golf
> carts, fork lifts, wheel chairs), and stands up not only to depth of
> charge, but FREQUENT charging from a discharged state. 300-400 cycles as
> opposed to say 30 or 40.
>
>>
>>
>>
>>>A 5 year or better lifetime for these batteries at room temperature is
>>>an entirely reasonable expectation according to the specs.
>>
>>
>> According to the specs the life is 3~5 years on a trickle charger at 25C,
>> and approx 5 years at 20C. I would take the 5 years life as a best case
>> scenario.
>
> You're right: The stated specs for the LC line as a whole indicate 6-10
> years, but the spec for my particular part indicates 5 years at 20C.
> Interesting contradiction.
A liquid acid with solid lead-antimony plates could last between 6-10 years
and take deep deep cycling < 20%, plus there are probably a few newer plate
materials that offer better strength and chemical stability.
>
>>
>>
>>>The stated
>>>lifetime of the LC line is actually 6-10 years using the stated
>>>discharge assumptions.
>>
>>
>> I see no reason to make that assumption.
>
> Not for robotics use -- but it does tend to explain why my batteries are
> just now showing signs of wear after nearly 5 years.
>
>
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>
>
> What is "true" deep cycle? Some batteries will cycle deeper and more often
> than others, but that does not mean other batteries are not "deep cycle."
> There are many SUV vehicals, and some are better than others, but that does
> not mean the others are not SUVs.