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(OT) Is this true ; or make any sense??
NEVER put a charge (a bulb) across NiCads untill the
batteries are fully drained. You will damage the
batteries, guaranteed.
You have to discharge NiCads down to 1.0 Volts per
cell. NEVER below. This is know as the "knee" in a
graph.
Say that you have a 7.25 Volt battery. That would be 6
times 1.25 Volt cells (fully charged). Put a charge -
a light bulb is a good compromise - untill you read
6.0 Volts across the battery With the bulb still
connected. Then disconnect the bulb.
Recharge at 1/10th of the rated Amp/hours for 16
hours.
Repeat three times.
Your battery should be reasonnably recycled. If the
battery is toasted, then it is toasted, and buy a new
one.
Static voltage (with no charge) of a NiCad battery
should always be 1.0 Volt per cell. So in the above
exemple, your 7.25 Volt battery should always read
ABOVE 6.0 Volts ( 6 times 1.0 Volt). If it reads lower
than that, you have one or more damaged cell. Buy a
new one.
Cheers.
Marc
'83 Scirocco
'88 Scirocco slegato
--- Kenneth & Georgianna Robinson
<krobins2@twcny.rr.com> a écrit : > Thanks for your
reply!! I guess I'll stick with the
> light bulb draw experiment for now;closely
> monitored.All I have now is a small l.e.d. bulb;Ill
> get a bigger one tomorrow.Ken R.
> ----- Original Message -----
> From: broke
> To: Allyn ; Kenneth & Georgianna Robinson ;
> Scirocco List
> Sent: Tuesday, October 08, 2002 7:26 AM
> Subject: Re: (OT) Is this true ; or make any
> sense??
>
>
> Be careful leaving the battery on the lights after
> the lights have stopped burning.
> Like Al said, this is an old RC trick, used to
> revive old racing packs.
> If you leave them on the lights, you risk
> reversing the voltage of the cell, or one of the
> cells that make up the pack.
> The memory are really cystals inside the cell that
> is keeping it from fully draining or charging.
> Cystals are built up a number of ways, like not
> fully discharging, not fully charging, etc.
> NiCad batteries are bad for it, and the MH
> batteries were supposed to be less sensitive, but
> they'll still do it too.
> Once cell voltage reversal has occured, you can't
> change it, and that cell is shot.
> We used to run 12V auto bulbs in series to produce
> a very high amp draw. Once the lights went out, you
> HAD to pull the pack. After a bit, items like a
> Battery Bug or a pack staablizer were introduced,
> and this replaced the light bulbs set-up, and with
> built in circuitry, it would cease the draning once
> the pack discharged, to prevent the cell reversal.
> Then you would either slow charge it fully, or use
> a higher end peak charger, which monitors the cell
> voltage and shuts off charging when peak voltage
> begins to drop.
> Do a search on Nickel Cadmiuim batteries or RC
> battery care, and you'll find some more info on the
> subject.
> Depending on the care, NiCads have about 1000
> charges in them before they crap out.
> I ran electrics for 10 years, before finally
> switching over to nitro-methane. Since I got into
> the VWs though, the poor RCs have just sat and
> collected dust.
>
> Broke
> ----- Original Message -----
> From: Allyn
> To: Kenneth & Georgianna Robinson ; Scirocco
> List
> Sent: Monday, October 07, 2002 10:58 PM
> Subject: Re: (OT) Is this true ; or make any
> sense??
>
>
> memory makes the battery produce a sort of
> internal resistance. put it in the camcorder and it
> seems dead (just like a faulty ground cable on our
> roccos). put it in the charger, and it think its
> done in minutes (again, due to this resistance,
> dropping voltage, ending up with the outward
> appearance of a fully charged battery (as far the
> the charger can tell, from the outside)).
> you need to fully discharge the battery
> (light bulb) for abt 6 hours (even if the bulb is
> hardly lit), then fully charge it (slowly, not the
> quick charger, if its an 8 hr slow charger, leave it
> for 24 hrs so the cells equalize), then do the light
> bulb thing again (abt 3 hrs past where it gets dim),
> and charge it one last time (slow, again, 24 hrs).
> this will attempt to get rid of the memory in nicd
> batteries.
> if the batteries are very old, it may just
> be their time to go, especially if they are nicd.
> the old light bulb trick comes from the r/c
> car days, people would fully discharge their packs
> with the same light bulb type things after each run.
> HTH
> Al
>
> ----- Original Message -----
> From: Kenneth & Georgianna Robinson
> To: Scirocco List
> Sent: Monday, October 07, 2002 9:09 PM
> Subject: (OT) Is this true ; or make any
> sense??
>
>
>
> ----- Original Message -----
> From: Kenneth & Georgianna Robinson
>
> Subject: (OT) Is this true ; or make any
> sense??
>
>
> Someone told me awhile ago,that if your
> camcorder battery won't take a charge
> anymore(develops a memory--???); that you need to
> put some kind of light with wires across the
> contact/charging terminals of the batt.If the light
> is connected right,the light will light up,and when
> it goes out completely you are supposed to be able
> to charge it up again.Has anyone heard of this
> before??? My batt. is undergoing this right now.I'll
> find out tomorrow if this works.Ken R.
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