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recommend a ("smart") automobile battery charger?

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Posted by William Wixon on March 23, 2009, 7:04 pm
 
hi,
wondering if you guys can recommend a "smart" automobile battery charger,
brand, model, etc..

b.w.



Posted by vaughn on March 23, 2009, 7:07 pm
 


   To get a better answer, you really need to tell us a bit more about the
charger's intended use.  For normal auto use, you don't really need a "smart
charger" at all, a charger with starting ability is probably more useful.

Do you just need a "maintenance" float charger to keep a battery up?  That
application would net you a whole different answer!

Vaughn




Posted by William Wixon on March 23, 2009, 9:02 pm
 

i'm going to use it to charge automobile and lawnmower batteries.
i imagine a charger with starting ability would be more expensive.
i want a charger that'll *stop* charging automatically after the battery is
fully charged.
i already own a float charger.
any recommendations?  brand, model?

b.w.



Posted by William Wixon on March 23, 2009, 9:13 pm
 

forgot to mention, i'm in the u.s.a. (northeast)

b.w.



Posted by Jim Wilkins on March 24, 2009, 12:29 pm
 
I have an older Schumacher charger with 2, 10 and 50 Amp ranges, on
10A it shuts of at the selectable "Conventional" or "Maintenance Free"
full charge voltage. IIRC the 2A range is always on so it might be
able to equalize a low cell, but I use a modified charger with a
higher output voltage and a current meter for that.

I don't see the point of paying extra for temperature compensation on
a higher-powered charger. You use them to bring the battery back up so
you can start the vehicle, then it's on it's own alternator. Float
chargers can benefit from it unless their output is low enough that
they won't overcharge. I've seen ~ 100mA suggested as safe for lead-
acid.

Jim Wilkins

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