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Author Topic: Reviving Nickel Cadmium batteries  (Read 4940 times)
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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.


Nowt currently, Aberdeen.....well actually very well insulated extension with passive solar that seems to heat the house....
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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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« Reply #2 on: December 21, 2009, 03:29:12 PM »

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.

1.98kWp PV (11 x Sharp 180 and SB 2.5)
20 x 65mm Thermal and 180ltr unvented
Powervault 4Kw - G200 Lithium-Ion (LiFePO4)
9000ltr rainwater storage   Plymouth
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