[R-390] Batteries

[Jbrannig at verizon.net]

My residential sample is no where near what you fellows have experienced, 
but
I've found Duracell leakage in AA, C, and D sizes including a completely 
trashed 3 X D cell Maglite.

AA's and C's in seldom used VOM's have been a problem.

I just replaced leaky AA's in a set-back thermostat.

My rememberer is frequently faulty, I don't seem to recall  this level of 
leakage in "yonder days"

Jim

PS: Duracell replaced the Maglite

-----Original Message----- 
From: Raymond Cote
Sent: Saturday, November 15, 2014 12:35 PM
To: Johnsay Johnsay
Cc: r-390 at mailman.qth.net
Subject: Re: [R-390] Batteries

Ditto the battery references. I also worked in oceanography and purchased my 
batteries by the pallet loads. I had no trouble with leaks or bad cells. On 
our case, we tested many cells in 1978 or 1980 time frame and concluded with 
voltage and current tests that the copper top Duracell was top with 
energizer a close second. The others listed did not come close. We soldered 
multiple batteries together to fit in a round pressure case to get the right 
voltage/current specs we needed. An instrument would be expected to last on 
the ocean floor up to a year. Our timed releases were also powered with 
Duracell batteries to fire an explosive bolt.


Raymond Cote
KD9CCZ



On Nov 15, 2014, at 09:25, Johnsay Johnsay via R-390 <r-390 at mailman.qth.net> 
wrote:

In my line of work I purchased pallet quantities of alkaline batteries for 
use in scientific oceanographic equipment.  These instruments (current 
meters,  thermistor strings and acoustic mooring releases)  were typically 
deployed for one and occasionally two years in difficult environmental 
conditions.  Batteries were frequently in storage for a  year or two before 
use due to the purchase requisition process.  All batteries were load tested 
before installation.   My preference based on a variety of operational 
characteristics were  first to last:  Panasonic Industrial,  Energizer, 
Duracell, and Rayovac.   Rayovac was well down the list with quite a few 
more problems with leakage.
We did a trial with primary lithium batteries but these tended to have more 
problems with leakage.   When this happened, due to their chemistries they 
would totally destroy the instruments.   Tadiran was particularly bad actor 
in this respect.John,  W8KX
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