wrote in news:1191374548.703118.153360
@r29g2000hsg.googlegroups.com:

Thanks for the info. I forgot to mention,, yes I have four wet
cell 6v
T-105s.



Another consideration, Chris, is COOLING the charging batteries
noone likes to consider. Yachites like things really neat, so
put the batteries in this sealed up wooden box that acts just
like a hot box for the poor batteries charging.

Heat is generated the old fashioned way during the chemical
change:

Power = Volts X Amps.

If you're charging at 14V at 40A that equals over a half a
kilowatt of electric power that is converted into heat by the
charging process. You can imagine how hot this could get in a
hot engine room where some idiot put the batteries to hide them
which starts out at 130F. The batteries are already hot when you
start charging them.

If you keep shoving AMPS, AMPS, AMPS into them, not matter what,
trying to "Yachtie Charge" them in minutes, and leave them
charging like this as the temperature rises, you can warp the
plates, boil the electrolyte, etc., etc. It's not rocket science
to see this isn't good for the batteries in the neatly-painted
wooden box that has 3 holes drilled in the top of it for the
wires to come out. Proper battery installations are always
VENTED, to let BOTH heat and hydrogen gas escape. Your car has
its battery located so plenty of cooling air gets to it, for
instance.

Please consider this when buying more AMPS to shove into them.

Larry
--
Please - Turn OFF cruise control when
you turn on windshield wipers!

On Wed, 03 Oct 2007 03:51:38 +0000, Larry wrote:

If you're charging at 14V at 40A that equals over a half a
kilowatt of electric power that is converted into heat by the
charging process.

Not true.

Are you saying that all of the charging power is converted into heat?

What about the portion that is turned into chemical energy? Heat
represents *wasted* energy in the charging process and should be about
20% of the total, not 100%.

Wayne.B wrote in
:

Are you saying that all of the charging power is converted into heat?



Eventually, yes. Whether it's the heat of the chemical reaction or the
heat of the internal resistance....it all comes off as heat at some point.

Putting batteries in an unvented, INSULATED box is a big mistake.



Larry
--
Please - Turn OFF cruise control when
you turn on windshield wipers!

On Wed, 03 Oct 2007 22:04:57 +0000, Larry wrote:

Are you saying that all of the charging power is converted into heat?



Eventually, yes. Whether it's the heat of the chemical reaction or the
heat of the internal resistance....it all comes off as heat at some point.

Putting batteries in an unvented, INSULATED box is a big mistake.

Battery boxes should be vented, no question.

The heat question is something else altogether. If all of the
charging power were converted to heat, there would be no energy left
over for creating a stored charge. Heat represents wasted energy in
the charging process, usually 10 to 20% of the total.