Battery zapper?

Battery zapper?
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Battery zapper?

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Battery zapper? - 5/25/2002 5:25:06 AM

bmwbob

Posts: 46
Joined: 5/16/2002
From: Titusville, FL, USA
Status: offline

Can anyone provide construction and operating info on what's termed a "battery zapper" for conditioning Nicads?
We have a good electronics surplus store in Orlando, and I'd like to put one together.
Or, lacking that, is there a website advertising these devices for sale?
Thanks!
Bob Cowgill
Cocoa,Florida
WB8CLQ/4
E-mail:rcowgill@cfl.rr.com

Post #: 1

Battery zapper? - 5/25/2002 8:00:35 PM

Red Scholefield

Posts: 4902
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline

There is no such thing as a zapper (or anything else) that "conditions" Ni-Cds. A zapper is simply a device to hit the Ni-Cd with a high current pulse sufficient to blow away a short that has developed and leaves hole in the separator where the short can reestablish any time from 10 seconds to 10 months. But if you want to play along with the concept

all you need to do is to quickly brush the leads from your battery pack (flight pack) across the terminals of your filed box or starter battery - auto battery will work also. Just a quick pulse is all you need. For transmitter packs you will need a higher voltage source.

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Red S.
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Battery zapper? - 5/29/2002 9:28:04 PM

hebertjj

Posts: 323
Joined: 1/18/2002
From: Knoxville, TN, USA
Status: offline

Red,

I'm not a battery zapper, but just curious. Are you saying that zapping is only a temporary fix for a problem that will quickly return at an unknown time? And when you "quickly brush" those wires to a car battery; is it plus to plus and neg to neg, or plus to neg and neg to plus? (That last one sounds like a real zapper for everyone involved!)

Thanks,
Joel

(in reply to bmwbob)

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Battery zapper? - 5/30/2002 2:32:56 AM

Red Scholefield

Posts: 4902
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline

Look at it kind of like a defribulator for batteries. It doesn't repair anything, just gives you a chance to go a bit longer with the same latent problems waiting to kill you.

+ to + is better, just a bit more sanitary, but the other way will work. What you are looking for is a large slug of current to blow away the short that has established through the separator. If you have a variable power supply just hook it up and keep cranking up the voltage/current watching the voltage on the cell. When the short blows the cell voltage will jump quickly to over 1.2 volts where before it was very low. You can actually tell the resitance of the short if you monitor the votage and current [ R= V/I ] before the voltage jumped up.

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Red S.
AMA 951 Leader Member

(in reply to bmwbob)

Post #: 4

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