Re: (ET) Deep Cycle Battery Question

["Konstanty, Walter \(GE Indust, ConsInd\)" <Walter Konstanty ge com>]

  Summary of earlier threads:
- Hydrometer is best measurement of a "good vs bad" battery by measuring 
cell specific gravity.
- The $20 load tester from Harbor Freight also provides an indication of a 
battery's capacity for load.

  Loading and draining will provide amphour drain capability which varies 
from battery to battery nameplate capacity - too complicated.
Good electrical connections most important.

...Walt

-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu
[mailto:elec-trak-bounces cosmos phy tufts edu]On Behalf Of Klein Robert
W NPRI
Sent: Wednesday, June 28, 2006 12:40 PM
To: 'noaddress drmm net'; elec-trak cosmos phy tufts edu
Subject: Re: (ET) Deep Cycle Battery Question


Does anyone think it might be of value to ascertain the condition/health 
of the battery, to but a good load on it and see how long it takes to 
drain it down to say 11.5 volts?

Bob Klein


-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu [mailto:elec-trak-bounces 
cosmos phy tufts edu] On Behalf Of David Roden
Sent: Wednesday, June 28, 2006 12:37 PM
To: elec-trak cosmos phy tufts edu
Subject: Re: (ET) Deep Cycle Battery Question


On 26 Jun 2006 at 11:51, Klein Robert W NPRI wrote:

> I've had the battery off charge now for a couple of days
> and when I put my ear close to the battery I clearly hear the 
> bubbling.

I've had batteries that, days or weeks off charge, still seemed to be 
gassing a bit.  There's no internal mechanism I know of that will cause 
disassociation of hydrogen and oxygen without external input, so I think 
that this is gas trapped as bubbles in the separators that gradually works 
its way out.  

Come to that, it seems as if it might have been more prevalent in the 
older 
batteries suffering from positive grid corrosion and mossing, but I'm not 
sure about that.


David Roden - Akron, Ohio, USA

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 
Note: mail sent to the "etpost" address will not reach me.  To send 
me a private message, please use "evadm at drmm period net."
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Est. 
yearly US cost to safeguard Persian Gulf oil supply: $50 billion Est. 2001 
value of US crude oil imports from Persian Gulf: $19 billion

                                -- Harper's Index, April 2002

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =        



_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu 
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak

_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak