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Old 11-14-2012, 02:21 PM   #11
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Concrete floor..., I remember hearing that a lot back in the early 70's when I worked at a full service gas station...., haven't heard it as often today.... but the station floors were pretty dirty back then! Any truth to it, I haven't the slightest idea.
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Old 11-14-2012, 02:29 PM   #12
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Yep its just hearsay with me as well, but I`ve never stored one on concrete floor just because............
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Old 11-14-2012, 04:19 PM   #13
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Concrete floor.....here's where I think this advice comes from. All rechargeable battery types will self discharge slightly faster when exposed to very cold temperatures. Some types more than others. In the winter here in the snow belt the concrete floors are quite cold, and the battery sitting directly on this will be more cold than if it's sitting on a block of wood. So, the advantage is small, and if the battery is on a float charger (battery tender) that would be more than enough to overcome the risk of cold exposure discharge while sitting on concrete over the 4 or 5 months of winter. Myself, I place mine on a wood block over the concrete floor, just for good measure.
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Old 11-14-2012, 05:32 PM   #14
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Feel free to laugh at me here - I found out where I read about not putting the Battery Tender higher than the battery - it was in the instruction manual! :hihi:

Can't believe I actually read that! But here's the link to the pdf on Deltran's site, and here's the clip I was talking about:

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Old 11-14-2012, 08:14 PM   #15
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BlueHaul. That is funny. I do not think I ever charge with the charger NOT higher than the battery. In my model T there is no way I could place the charger at the same level or below, unless the battery came out which is a pain in the rump. As for the TT batteries, I just charged them as usual. I placed the batteries on a sheet of plywood on the shop floor in their corner and placed the charger on the work bench (wood) that is right next to them.

I guess I broke all the rules.

Here is the rumor I have heard about storing your batteries on the concrete floor. It is from the teens through the 40’s, that the moisture from sitting on a moist floor would create an electrical conductivity path on the lower quality boxes, which allowed the batteries to discharge. No proof to the rumor, but is sounds reasonable.
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Old 11-14-2012, 08:24 PM   #16
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Quote:
Originally Posted by BlueHaul View Post
Feel free to laugh at me here - I found out where I read about not putting the Battery Tender higher than the battery - it was in the instruction manual!....snip
Nope, no one was laughing...., I just never heard that placing a charger "higher" than the battery could possibly overcharge the battery.

Looking further into the subject matter, what I found interesting is that your charger instruction manual uses the term "above", and my BatteryMINDer manual uses the term "directly above" when referencing improper charger location. The term "directly above" is pretty specific in location, but the term "above" is somewhat open for interpretation.

From my BatteryMINDer instruction manual: "Never place charger directly above battery being charged; gases from battery will corrode and damage charger".

Bob
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Old 11-14-2012, 08:46 PM   #17
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Quote:
Originally Posted by Jagiven View Post
Here is the rumor I have heard about storing your batteries on the concrete floor. It is from the teens through the 40’s, that the moisture from sitting on a moist floor would create an electrical conductivity path on the lower quality boxes, which allowed the batteries to discharge. No proof to the rumor, but is sounds reasonable.
That is another explanation I have heard, which may apply to that era. In those days, I believe the battery case was made with a material called Bakelite (plastic didn't exist). It was a little prone to being brittle and a tendency to develop some cracks. Cracks in the wrong places would of course allow the acid to leak out, or moisture to get in, depending on where the crack was. In recent decades the cases are made of plastic and of course much better mechanical integrity.
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Old 11-14-2012, 10:05 PM   #18
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I looked up this rumour on Snopes.com - a source of info on all sorts of rumored truths. It turns out that yes, old time battery cases were made of a rubber that allowed acid to seep out and cause a circuit that led to discharge.

As well, automotive batteries discharge LESS when kept cold.

The link is below.

http://www.snopes.com/autos/techno/battery.asp
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Old 11-14-2012, 10:46 PM   #19
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Here's what Wikipedia has to say about cold storage of batteries in general.....
=======
"Extending battery life
Battery life can be extended by storing the batteries at a low temperature, as in a refrigerator or freezer, which slows the chemical reactions in the battery. Such storage can extend the life of alkaline batteries by about 5%; rechargeable batteries can hold their charge much longer, depending upon type.[66] To reach their maximum voltage, batteries must be returned to room temperature; discharging an alkaline battery at 250 mA at 0C is only half as efficient as it is at 20C.[36] Alkaline battery manufacturers such as Duracell do not recommend refrigerating batteries.[35]"
=======
In my earlier post, I was confusing battery capacity when cold (various degrees of poor), with ability to maintain the cell voltage when cold. I would guess Duracell does not recommend cold storage for a reason.
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Old 11-15-2012, 10:17 AM   #20
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Quote:
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From my BatteryMINDer instruction manual: "Never place charger directly above battery being charged; gases from battery will corrode and damage charger".
That makes perfect sense to me! Call me crazy but if I blow the dust off that part of my brain I seem to remember my high school electronics shop teacher saying something about electricity flowing through wire is like water flowing through a hose - it flows easier downhill. I'll have to do some research on that one and report back what I find!
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