Re: Got 4Ah, not 5Ah, battery 18V (20V) - done right thing?

On Sun, 19 May 2024 16:38:31 -0700, Bob La Londe <none@none.com99>
wrote:

On 5/19/2024 4:29 PM, Bob La Londe wrote:

On 5/19/2024 4:17 PM, Jim Wilkins wrote:

"Bob La Londe"  wrote in message news:v2djrv$3hfus$1@dont-email.me...
>
On 5/18/2024 7:33 PM, Jim Wilkins wrote:
...
>
I never was employed doing destructive testing, but I did spend a decade
or two doing low voltage communication contracting.  I learned there is
what they say, and there is what there is.  Usually what they say fell
short in my field, but sometimes it didn't.
>
When they say an IR motion sensor will detect motion at 90 feet they
mean if ambient is below 70F and the subject is large and is running a
fever.  LOL.  They don't say if ambient is 90+ its virtually worthless.
>
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Most of the testing was to find and reject or reclassify parts that
didn't meet specifications for companies that cared, or burn-in
testing to weed out early failures by operating at elevated
temperature for a week. The exact conditions were usually secret, I
had to provide a range of adjustment. Sometimes there had to be
provision for destructive failure, such as Chrysler Lean Burn engine
controllers with components not rated for possible under-hood
temperatures.
>
Before Congress mandated emissions and fuel economy standards that
needed electronic control to meet, the only electronic device in a car
was the radio which the auto makers bought, they had to hire new
engineers unfamiliar with the heat, water, dirt, salt and vibration,
who took time to learn. I had the partial advantages of military
electronic experience which solves those, in commercially unaffordable
ways, plus a hands-on apprenticeship in custom electro-mechanical
machine design. The engine compartment environment can be nearly as
challenging as military aircraft specs, consider a snow plow driver in
Alaska starting cold and diving full throttle into the deep snow in
front of the truck, or splashing through an icy puddle.
>
Heat in the South is another issue that's not so evident in Michigan.
I know what Atlanta is like in summer.
>

 
 
Bell Labs had material test sites down here in the Sonoran Desert for
environmental testing.  Death Valley may be the only place in North
America more hostile than the low Sonoran Desert.  They had panels setup
with material samples affixed out along the southern rail line right of
way.  Maybe they still do (if they are still some form of Bell Labs).  I
haven't checked in a long time.
 
 
 

>
I'm not a fan of Michigan weather.  My wife used to go to the Wheatland
Music festival every year and of course she convinced me to go one time.
 Middle of summer.  Should have been fine.  It rained everyday (most of
the day) and we camped out.  I was cold and wet the entire time, and of
course I felt like I came down with a cold the second day... and she
volunteered us to work the info booth one shift every day.  Can't say
how many times I said, "Ice truck is that," "Bathrooms are that way."
>
When I was a kid I wanted to live where there was snow and trees.
Now...  No. I am good right here.  Yeah the heat is miserable, but its
familiar, and my office is air conditioned.  Actually, so is my main CNC
machine room now.  The rest of the shop... well an ice tea tastes so
much better when I get out of the main shop and back into the office.
>
--
Bob La Londe
CNC Molds N Stuff

 You can put on extra clothes until you are warm - you can't take off
enough to be cool - - -  Personally There is no place like the area
dead between the lakes in South Western Ontario. In the summer it can
be uncomfortably warm and humid for a few weeks- sometimes not even
cooling off over night - so  air conditioning (in home and car) is
pretty well mandatory - and we get numerous thunder storms - but we
are just south east of Ontario's "tornado alley"so seldom get SERIOUS
storms - and the winter is moderated by the lakes as well - very
seldom get long periods of VERY cold weather - and in the little
stretch of heaven called Waterloo Region we've been in something of a
"snow shadow" for the last several decades, getting less snow than
areas to the North, west, and even south ( as little as 15 miles away
can have significantly more snow).