AC Input to DC Chargers

Tue Feb 18 05:37:13 AKST 2003

NO.... you will overcharger and cause the battery to swell and short out.  You must charge gell cells at a lower rate like 1-3 amps till peaked.  I use my FMA SuperNova and it works just fine.

> Can you do this with the 12V gell cell batteries??
> 
> 
> Keith L. Hoard
> Cordova, TN
> khoard at midsouth.rr.com
> 
> "Going to war without the French is like... going into the ninth inning
> without your place kicker"
> 
> 
> ----- Original Message -----
> From: "wgalligan" <wgalligan at cnbcom.net>
> To: <discussion at nsrca.org>
> Sent: Monday, February 17, 2003 1:16 PM
> Subject: Re: RE: AC Input to DC Chargers
> 
> 
> > All you need to do is run a hot lead from you main battery to your second
> battery and then ground that battery to somewhere and the body. Use heavy
> enough gage wire and make sure your connections are solid. I would fuse it
> with a 30 amp fuse to protect things from burning up in the event of a
> short.   I have a lead acid battery in a seperate compartment on the outside
> of my trailer and thats what I do to keep it charged up.
> >
> > I would recomend keeping the battery in a ventlated area, not inside a
> vehicle.  When the battery charges it puts out hydrogen and this is
> extremely volital and is the main reason batteries explode when being jump
> started.  The spark from hooking them up or disconecting them will ignite
> the hydrogen gas.  I have seen batteries explode when just starting the
> vehicle because the internal plates shorted out.
> >
> > > Could you give us a circuit to carry an extra 12v car battery in the >
> back of the van that charges up again while we drive??
> > >
> > > Regards,
> > >
> > > Eric.
> > >
> > > -----Original Message-----
> > > From: wgalligan [mailto:wgalligan at cnbcom.net]
> > > Sent: Monday, February 17, 2003 1:51 PM
> > > To: discussion at nsrca.org
> > > Subject: Re: AC Input to DC Chargers
> > >
> > >
> > > I'm in the car business so I think I can answer this one.  Unless you >
> are charging several other peoples batteries off you car battery then it >
> shouldnt go dead buy the end of the day.  How old is your car battery? > Is
> it hot out during the day?  These are factors in your cars battery > ability
> to charge your equipment tand then be able to get you home.  In > hot
> climate like here in Texas the heat is extremely tough on car > batteries.
> It can cause sulfating of the battery.  Once this begins to > happen the
> battery loses its ability to retian its charge and will not > fully charge
> to its capacity.
> > > So if your battery is about 3yrs old be suspect that it could be going >
> bad.  Another thing that a lot of people dont realize is that the > battery
> could be drying out.  Make sure your battery is full of fluid > (distiled
> water only), this can also cause premature failure of your > cars battery.
> The most your taking out of your car battery charging > your airplanes is
> probably less then 5 amps.(electric dudes correct me > if I'm wrong)  Not
> enough to kill a good battery. Even if you are > charging e-flight
> batteries.
> > >
> > > OK... so much for shop 101.....
> > >
> > > Wayne
> > >
> > > > Yep, Im planning to do that. One of my chargers
> > > > specified a 13 amp supply to meet its max output
> > > > rating.
> > > >
> > > > Another thing, Im finding that my car battery doesnt
> > > > have the duration it once did. I used to charge my RC
> > > > batteries at the field, but have been supprised
> > > > recently by a dead battery when Im trying to go home.
> > > > Has anyone put heavy duty batteries in your car to
> > > > compensate for this?
> > > >
> > > >
> > > > --- Bob Kane <getterflash at yahoo.com> wrote:
> > > > >
> > > > > The 12 volt section of most PC power supplies don't
> > > > > come close to supplying 25 amps, so I would not feel
> > > > > bad about your purchase. I own a 15 amp supply and
> > > > > run multiple chargers at high charge rates
> > > > > simultaniously, something a pc power supply can not
> > > > > do.
> > > > >  Brian Young <b4598070 at yahoo.com> wrote:Reading all
> > > > > the response to this I wish I had asked
> > > > > the question a couple weeks ago. I picked up a 12VDC
> > > > > 25amp supply at radio shack, oh well, couldve done
> > > > > that PC power supply conversion and saved $60.
> > > > >
> > > > > --- Ted Sander wrote:
> > > > > >
> > > > > >
> > > > > > Veering a little off thread about battery
> > > > > chargers,
> > > > > > has anyone adapted a PC
> > > > > > power supply to feed any of these chargers on the
> > > > > > bench? Any cautions to be
> > > > > > aware of? Seems like most chargers are made for
> > > > > 12V
> > > > > > input - great at the
> > > > > > field, not so handy on the bench unless you spring
> > > > > > for the high priced
> > > > > > add-on. Obviously, we're talkin' enough input
> > > > > > capacity for TX and RX
> > > > > > batteries here, not mega-cell electric flight.
> > > > > I've
> > > > > > got two or three old
> > > > > > dead PC's peeking out from under the
> > > > > workbench.....
> > > > > > Going further, any advice on converting these
> > > > > power
> > > > > > supplies to a reasonably
> > > > > > accurate variable output? My TX lets me calibrate
> > > > > > it's built in volt meter,
> > > > > > but you need stable, varying amounts of dc voltage
> > > > > > to do it. I'm tired of
> > > > > > driving across town to borrow my friends regulated
> > > > > > power supply, plus having
> > > > > > my own would come in handy for other projects.
> > > > > (But
> > > > > > not enough demand to
> > > > > > justify buying one). Any web resources about this?
> > > > > >
> > > > > > > =========================> ============
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> > > > > >
> > > > >
> > > > >
> > > > > =====
> > > > > Brian Young
> > > > > Tulsa
> > > > > b4598070 at yahoo.com
> > > > > 918-745-6046h
> > > > > 918-838-0900w
> > > > >
> > > > > __________________________________________________
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> > > > > Bob Kane
> > > > > getterflash at yahoo.com
> > > > >
> > > > >
> > > > > ---------------------------------
> > > > > Do you Yahoo!?
> > > > > Yahoo! Shopping - Send Flowers for Valentine's Day
> > > >
> > > >
> > > > =====
> > > > Brian Young
> > > > Tulsa
> > > > b4598070 at yahoo.com
> > > > 918-745-6046h
> > > > 918-838-0900w
> > > >
> > > > __________________________________________________
> > > > Do you Yahoo!?
> > > > Yahoo! Shopping - Send Flowers for Valentine's Day
> > > > http://shopping.yahoo.com
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