Is this a scam? Resurrecting NiCad batteries?
 

http://resurrection.uniquedynamics.com/

Links to a site that sells a "secret" way to resurrect old NiCad batteries. Is this a scam?

I have a great drill with bad batteries. Replacement batteries cost more than I paid for the drill when it was new. Can old batteries really be resurrected?

I believe the trick their selling is to charge them at a very high current for a second or so. Heres a circuit that will do it for you. http://www.uoguelph.ca/~antoon/gadgets/rejuv.html Or you can just use some other source of a calculated voltage to do it..

You have to wonder why they aren't using a quality meter in their pictures. A Fluke isn't really very expensive.

The link that 300SD81 posted looks interesting. Somehow I doubt that you can get new performance out of the old battery, but anything is better than nothing. For a drill battery, perhaps a couple of 12V car batteries in series would do the job as good as NiCads.

They really want you to buy a new drill when your batteries die. Interesting idea.

My Makita impact driver sells for about $220 new. I got one on e-bay for $120. New batteries are around $50 to $60 so at new prices, it's less to buy new batts than a new screw gun.

E-bay usually has good deals on batteries.

Thanks for the answers. I'll look into the ZAP circuit.

I really want to buy a new kit with several cordless tools but don't really need them. A little more life out of my batteries would be appreciated.