I am not an electrical guru, but I always thought that the charge was a
result of the higher voltage going in VS the actual amperage... Thus the
reason a trickle charger may take an entire day to recharge a standard bike
or car battery if it is pretty low... I figured a small trickle charger
might be able to handle a 12 volt forklift-size battery in a week or
something similar presuming the "sitting still and not being used" discharge
of the same battery was less than what was going into it.
50 amps... That's certainly not something I have sitting at home. :)
Joe, the problem with that is that a certain minimum current (I'll
call it "leakage current", but that's not really an accurate
description) is necessary to overcome electrolytic losses during
An automotive trickle-type "maintainer" might work on, say, a 125AH
battery, but the batteries in our lift are 600AH types (like big 6V
diesel truck batteries). The plate areas are greater than a smaller
battery's would be, and thus the "leakage current" is larger. I don't
think a trickle charger of the ordinary type would work, even if you
had a 36V version.
OTOH, our battery charger for the lift is "intelligent". It charges
at maximum rate until it determines that the battery is fully charged,
then switches to a pulsed maintenance rate which is supposed to break
up sulphation on the plates, staying there unless or until it sees the
voltage drop below the "charged" value.
The charger alone weighs about 300lb, and runs off 240V.
On Mon, 17 Aug 2009 10:03:00 -0500, "Karl Townsend"
My Yale forkilt is 36 volt, charger is 208-240, 480 three phase. When
I plug the battery in and start the charge it's just under 200 amp,
goes down to around 100 amp before shut-off. My battery is 2600
Forklift will pull 200 amps from the batt going across the driveway
and it will hit 400 amp going up the slight incline to the doorway. (
with a 2000 pound load on the forks.)
Most new lifts I've seen are 36 or 48 volt, lower voltages seem to be
a thing of the past. More volts = lower amps, therefore smaller wire
and less copper.
I just sold my old 24 volt charger for 50 bucks, not much call for
them it seems, took 3 months of ebay and craigs list to get rid of it.
I had my doubts on the battery but it did hold up to unload 24 tons of
wood pellets off a truck into my lot then off the lot and into the
warehouse on one charge.
Remove 333 from email address to reply.
On Tue, 18 Aug 2009 01:03:04 -0400, email@example.com wrote:
I've never heard of anything over 48V .. once you go past 50V you are
past what the electical code considers low voltage and a whole new set
of rules apply. A friend of mine works in the telecom business and
he says on a nice hot sweaty day 48 volt will give you a nice shock.
Remove 333 from email address to reply.
Check on ebay. I had to replace batteries in a wheelchair and found
some still expensive but a heck of a lot cheaper than the local guys
One offer at 1560 but the guy has a low rating
I don't have time to wait around, need it in two weeks.
Nationwide there "Batteries Plus" which may have some small selection
of Forklift and Electric Truck batteries, and "Interstate Batteries"
distributors that will have some forklift batteries in addition to car/
But otherwise I think you might have better luck just looking in the
yellow pages for "forklift batteries" to find a local dealer.
If they have what you need, an "Interstate Batteries" dealer is likely
to be the cheapest. Otherwise there will be some forklift dealer
markup involved, and they probably charge individual buyers who don't
know how to shop around way more than they charge a warehouse with a
dozen electric forklifts which has multiple regional dealers to
With hundreds of pounds of lead, none of these will be cheap. Your old
batteries have considerable scrap lead value, make sure they are part
of the deal.
On Mon, 17 Aug 2009 06:09:17 -0500, "Karl Townsend"
Karl, What is it that this battery goes into. That looks like it
would be for a walkie rider/ pallet jack. If so then you may want to
look into four 12 volt deep cycle batteries. Wired up in a series-
parallel circuit I have had these last a long time but that all
depends on your application. You also say its dead, one cell or
all? A repair may be another avenue for you.
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