 OT: "Resurrecting" NiCad batteries |
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| smontanaro |
 Oct 15 2006, 01:57 PM
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#1
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Senior Member  Group: Members Posts: 1,190 Joined: 3-June 05 From: Evanston, IL Member No.: 4,197 Region Association: Upper MidWest  |
I have a Ryobi battery-powered drill whose two batteries are -- for all intents and purposes -- dead. While poking around for replacements I came across this site:
http://resurrection.uniquedynamics.com/ Is that bogus or for real? I also came across this: http://www.hackaday.com/2005/08/26/how-to-...on-and-upgrade/ I suppose it can't hurt to try this one out (it's free and the batteries are essentially dead). In short, can you "resurrect" a NiCad battery? Thx, Skip |
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| dwillouby |
Oct 15 2006, 06:15 PM
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#2
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Member Group: Members Posts: 392 Joined: 27-December 02 From: Mt Washington, KY Member No.: 29 Region Association: None 
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Yes, We used to do it all the time at work. We used 7.2 vdc ni-cads. Apply about 14 volts. It would work 90% of the time. Put a amp meter in
series with the charger. At first it wont draw any current. As the thershold resistance of the battery is overcome it will start drawing current. Reduce the voltage as to not overheat the battery. David |
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| porschecb |
Oct 15 2006, 06:36 PM
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#3
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Senior Member Group: Members Posts: 1,092 Joined: 13-August 04 From: Las Vegas NV Member No.: 2,529 Region Association: None |
No! No! & No. I am in the battery Biz. Unless you have an anlalizer to measure voltage & Mah you can never know what shape your battery is in. there is no magic! (by the way it takes 3 hours to analize a battery and give you the results) If it does not hold at least 80% of it's mfg. capicity it's not going to last long. Voltage is just 1 part Mah is the capicity of charge left in the battery.
Michael tei4batteries.com |
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| davep |
Oct 15 2006, 06:40 PM
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#4
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914 Historian Group: Benefactors Posts: 5,144 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
So is what this guy is selling 'snake oil'? I did read many years ago that shocking a battery with a very high voltage tends to burn out the internal shorts that are causing the battery to fail.
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| porschecb |
Oct 15 2006, 06:47 PM
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#5
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Senior Member Group: Members Posts: 1,092 Joined: 13-August 04 From: Las Vegas NV Member No.: 2,529 Region Association: None |
Yes!!!!!!!!!
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| Joe Bob |
Oct 15 2006, 08:40 PM
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#6
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Retired admin, banned a few times Group: Members Posts: 17,427 Joined: 24-December 02 From: Boulder CO Member No.: 5 Region Association: None |
QUOTE(porschecb @ Oct 15 2006, 05:36 PM)  No! No! & No. I am in the battery Biz. Unless you have an anlalizer to measure voltage & Mah you can never know what shape your battery is in. there is no magic! (by the way it takes 3 hours to analize a battery and give you the results) If it does not hold at least 80% of it's mfg. capicity it's not going to last long. Voltage is just 1 part Mah is the capicity of charge left in the battery. Michael tei4batteries.com So can ya give the club rates on De Walts and Optimas? |
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| porschecb |
Oct 15 2006, 10:25 PM
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#7
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Senior Member Group: Members Posts: 1,092 Joined: 13-August 04 From: Las Vegas NV Member No.: 2,529 Region Association: None |
I will offer to check any nicad battery. You pay in I pay out. This includes a condition & analize. Tells us both the status of the battery. I deal with two way radio batteries for the most part. But can do any Nicad battery if the voltage & mha are stamped on the battery. That way I know what I am dealing with.
Michael |
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