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Author Topic: Reviving Nickel Cadmium batteries  (Read 4856 times)
rt29781
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« on: December 21, 2009, 12:33:04 PM »

As some of you know we are renovating a house.  During this period we have got through several chaep portable electric screwdrivers.  these screwdrivers use 18V NiCd baterries.  Over time the batteries lose the ability to charge.  I took the oldest of our batteries and connected it to my spot welder.  A few quick jabs of a welding rod on the terminal shocks the battery and cuts internal shorts.  The internal shorts are caused by Cadmium crytal growth.  Now the old battery works very well.  I am now working my way through our stock of batteries.  There is a video on the internet that demonstrates this technique.
http://www.instructables.com/id/Revive-Nicad-Batteries-by-Zapping-with-a-Welder/

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Nowt currently, Aberdeen.....well actually very well insulated extension with passive solar that seems to heat the house....
martin
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« Reply #1 on: December 21, 2009, 12:37:18 PM »

good tip! - I'll try it on 'er indoors! whistlie
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Unpaid volunteer administrator and moderator (not employed by Navitron) - Views expressed are my own - curmudgeonly babyboomer! - http://www.farmco.co.uk
Iain
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« Reply #2 on: December 21, 2009, 03:29:12 PM »

Hi
Did this  a while ago on a 7.2v Ni Cd. I used a 24v battery to shock it. Still working after 6 months.
Wrth trying.
Iain
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