[RE-wrenches] High amp charge to desulphate

[Darryl Thayer]

I have had some luck sometimes.  First what I find is they seem to not take a charge at all, I had to apply close to 120 volts to get it to take a 1/2 amp.  What I did, got a 600 volt 6 amp rectifier,($2.00)Radio shack. (i have a NTE 6013 on my desk in a flat pack, and it is about 800 volt and 12 amp as an example) Connect in series a 200 watt Lamp and the diode and the battery (IN the correct direction to charge the battery), plug it into the wall and you will have a desulfator of sorts.  Be careful!!! you are working with 120 AC as high as 170 volts.  To Begin with you can put several cells in series.  If the lamp is sort of bright try another method, the batteries are taking a charge.  Last time I used the method the lamp on two L16 in series was out after a day or two it was dull brightness.  the batteries came back to about 50% in a two week period 
Darryl

--- On Sun, 1/10/10, Kent Osterberg <kent at coveoregon.com> wrote:

> From: Kent Osterberg <kent at coveoregon.com>
> Subject: Re: [RE-wrenches] High amp charge to desulphate
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Date: Sunday, January 10, 2010, 5:11 PM
> 
> 
> 
>   
> 
>  
> Ron,
> 
> 
> 
> Before hitting them with a lot of current, I'd put
> groups of six on a
> lower charge with an external charger for a while. 
> It'll give you a
> chance to see how each one is doing.  Then re-wire
> them for 24-volts
> and connect the Outback inverter.  If they are to come
> back to life
> they'll need a long long time.
> 
> 
> 
> Kent Osterberg
> 
> 
> 
> 
> 
> 
> 
> Ron Young wrote:
> I
> have just acquired a 24v set of 1400a/h 2v cells that have
> been in
> storage without a charge for several years. They were
> connected up in a
> system that was never turned on (long story). I believe
> these batteries
> can be recovered if I can get a high enough amp charge into
> them. The
> battery mfg. recommends putting a 200 amp charge on until
> internal temp
> rises to 40 degrees C then let them cool and do it again,
> maybe 15
> times, to blow the sulphates of the plates. Unfortunately I
> don't have
> a 200 amp charger but I do have an Outback 3524 inverter
> with an 85 amp
> charger. I'm wondering if I can force the inverter to
> maximum charge to
> accomplish this.
> 
>   
> 
> I hooked the inverter up but the batteries only have about
> 10.5 v
> output from the batteries (hooked up 12 in series for 24v).
> For this
> reason the Outback won't power up. I am wondering about
> using a
> standalone charger to provide power to the batteries --
> which will also
> provide power to the inverter -- and allow it to come on
> and charge. 
> 
>   
> 
> Anyone suggest a better way?
>   
> 
>   
>   Ron
> Young
>   
> 
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