Re: (ET) Battery Question

[David C Robie <mycroftxx1 juno com>]

YAH on Chinese test equipment too.  And cheap enough to throw away if you

inadvertantly run it over with a 1000 lb Etractor.

As to 'exact:   Again, don't worry about the 2nd number after the decimal
too much.  No precision in matching is necessary to get your lawn done. 
As long as they are in the same ballpark they are fine.  (and yours match
up a heck of a lot better then mine after equalizing  which is a mixed
pack of varying ages and previous use and I stll get all my work done on
one charge - if I charge (most charging here is solar).

Dave
Weymouth MA




On Tue, 12 Dec 2006 12:54:39 -0500 "Raymon Ellis"
<raymonellis adelphia net> writes:
> David C Robie wrote about his Chinese Smithy XL:(had her for bout 10 
> yrs,
> not a week goes by that I don't do something with her, and still 
> deliriously
> happy with her). I can echo his comment in reference to the 
> instruments used
> to read power, current, and voltage on my E-20 to check USA Made 
> CR-225
> battery charges, the Model P4400 Kill A Watt 125VAC 15A 1875VA, and 
> EXTECH
> True RMS Multimeter Radio Shack.  My wife interrupted the battery 
> charging
> to use the E-20 to shred leaved on the lawn. The mower does a good 
> job of
> reducing the dry leaves into smaller pieces so they meld into the 
> lawn. It
> is much easier and cleaner than collection with the Goat. There are 
> no fumes
> and much less dust. Three hours of shredding leaves consumed about 
> 3.87 KWH
> and brought the batteries down to 37.83 volts. Jim Coate wrote that 
> Trojan
> recommends the following end voltages for a 36 volt system: daily 
> charge:
> 44.4 volts, equalization: 46.5, constant float: 39.6. He also wrote 
> that one
> should add 0.5 volts for every 10 degrees below 80 deg F and 
> subtract 0.5
> volts for every 10 degrees above 80 deg F. If one assumes that his 
> formula
> is OK to equalize the new Crown CR-225 batteries in my E-20, the 
> charger
> would need to reach 46.7 volts. Yesterday I questioned the old GE 
> charger,
> but not today. After 17 hours the charging voltage reached 47.7 
> volts before
> the timer was turned off by me. The charging current started at 
> 9.05A and
> moved down to 1.85A at turn off. Power was measured at 859 watts and 
> moved
> down to 119 watts at turn off. Three hours later the batteries read:
> 6.56+6.53+6.56+6.52+6.50+6.56=39.23V. Now to figure out what this 
> all means
> to my E-20. I think like David C Robie said the batteries may not be 
> equal
> but will improve after some use.
> 
>  
> 
>  
>