What I'm asking this for is years ago I new a person the had a pickup truck
with two batteries in it for starting in the winter in northern Minnesota when
it gets 30-50 below zero... Just was wondering how you would hook the batteries
up for that... Now here is another one for you if you took the batteries and
hook them by positive to positive and negative to negative then put a wire
between the positive and the negative of each battery what would that do???
ROB FROM MINNESOTA
----- Original Message -----
From: Dale Leavens
To: [email protected]
Sent: Sunday, November 11, 2007 10:19 AM
Subject: Re: [BlindHandyMan] series or parallel
Hi Tom,
Is that correct? I don't know myself but intuition would suggest to me that
if the batteries were connected in parallel without the charger they would soon
about balance each other. Once the charger is introduced the same conditions
would apply, that is the weaker of the batteries would acquire charge faster
than the other then together they would come up about equivalently wouldn't
they?
I think I would be concerned about the load on the charger though. Most would
have a safety overload of some sort wouldn't they
? I haven't much experience with charging wet cells, as a kid we used to have
to top up the battery in a couple of our boats that didn't have their own
charging systems but that was about it. Oh yes, sometimes in the winter dad
would put a charger on the car battery on those real cold nights to improve the
chances it would start in the morning.
Dale Leavens, Cochrane Ontario Canada
[EMAIL PROTECTED]
Skype DaleLeavens
Come and meet Aurora, Nakita and Nanook at our polar bear habitat.
----- Original Message -----
From: Tom Fowle
To: [email protected]
Cc: [EMAIL PROTECTED]
Sent: Sunday, November 11, 2007 11:00 AM
Subject: Re: [BlindHandyMan] series or parallel
rob,
You'd do as you said, and that's parallel, but don't do it.
If, as is very likely the batteries aren't exactly identically
charged or discharged when you start, the current from the
charger will be unevenly distributed between the batteries. This
will almost certainly lead to uneven charging of the
batteries, and if perhaps one battery is much more charged when
you start than the other, you can get a very high current flow
between the batteries and
some pretty hot wires and batteries.
there is no reason to even try this as even if it worked it would
take twice as long to do the job, so you may as well charge the
batteries seperaately and be safe.
Again, charging two batteries from a charger designed for a single
battery can be dangerous and has no advantage, so please
don't do it.
with led acid or similar batteries it is O.K. to parallel them
for normal operation, re: running stuff as long as they're both
charged properly seperately. It's not a good idea to parallel
cells with nicad or nimh batteries either.
tom Fowle
Net-Tamer V 1.13 Beta - Registered
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