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NiCad battery renewal, it actually worked!

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NiCad battery renewal, it actually worked!

Old 11-30-2019, 06:19 PM
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Default NiCad battery renewal, it actually worked!

I had gotten a couple of brand new Skil 18V XDrive drill/drivers, each had the case, charger and one of them came with 2 of the NiCad batteries.

I had figured that for sure, that the batteries, even though they were about brand new and hardly used at all, that after so much time of them sitting as the cases were dusty, that the batteries would be dead and was why the PO had them on the street to get rid of them.

Of course, I get home, plug in both chargers and try to charge the batteries up. I was happy to find that the batteries were at least taking a charge but, after a few minutes the green charging lights would go solid-indicating a full charge, so I tried the drills and at first they'd work perfectly but after a few seconds, the batteries were once again drained.

I had left them to charge overnight and while this got the capacity to maybe 30 seconds or maybe a minute, I was about resigned to either buy them new $26 aftermarket clone batteries from Amazon or, just leave the things back on the street for the next sucker to come by and pick them up.

I went online and looked to see if there was any way to get NiCad's refreshed as with all I know of batteries, NICad's were always the crappiest of all the rechargeables out there as everything first went to NiMh and now Li-Ion. There were a few great video's about how easy it is to plug, and then unplug, then to repeat that over and over as the initial voltage that a charger puts out is a LOT higher than the regulated voltage that goes on once the initial plug-in settles down and this helps to shock all the crystals off the insides of the batteries and then allows the battery to take more and more charge.

By gosh, it totally worked. After a few hours of plugging and then unplugging, then leaving the charger to charge until the green light would go solid, and then repeating the process until sometime before lunch, all three batteries charged up and after a session of letting the kids drill holes in wood blocks in the basement, the 18V drill drivers were both strong enough and lasted long enough for any of the lame homeowner/trailer/boat/-whatever drilling/driving/screwing-options/jobs I'd ever have and not only did I get one very lightly used Skil XDrive/made by Bosch, NiCad 18V drill/driver and a slightly heavier duty version of the same drill but never used, now I have two of the things working perfectly.

I had read that leaving NiCad's discharged is actually better for the batteries than leaving them fully charged, which is odd to me but I'll just be making sure that I keep them charged up or at least to use them or let the kids use them every now and then.

I almost spent about $100 for a new LiIon Dewalt drill/driver as I already have a new Dewalt battery and charger for a reciprocating saw I needed to buy for a dock-project a month ago. Christmas came early for me.

The plugging/unplugging of the charger worked=amazing.
Old 11-30-2019, 06:44 PM
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keep us informed if they hold up over any time
Old 11-30-2019, 08:07 PM
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Next time just tickle them with your car battery. Just a second or two will put enough charge in them for the charger to sense them
If the voltage in the battery is to low,the charger won't recognize it.


Old 12-01-2019, 06:17 AM
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i just bought a cheap knock off battery for my old Craftsman impact driver a few weeks back. It is the size of the niCad but with lithium batteries. So last much longer than regular lithium. I'm sure they use cheap 18650's as opposed to Samsungs but it was worth the money. It worked very well and lasted all day driving in lag screws. I even dropped it from about 16 ft onto the dirt.
Old 12-01-2019, 06:46 AM
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I was searching Youtube the other day looking for a way to fix NiMh batteries for a set of Bosch tools I have and I ran across a video where a guy used his stick welder to zap nicad batteries. He claimed it knocked the crystals to hell and then allowed the batteries to take a charge. It worked on 2 out of 3 batteries he tried it with. I didn't save it but you could probably do a search and find it.
Old 12-01-2019, 07:57 AM
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All nicads are junk compared to LI packs. Hell,Ridgid has a lifetime guarantee on their LI packs.
Old 12-01-2019, 10:28 AM
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Hitting ni-cads with high voltage with a dumb charger will bring them back. I found a drill under a customers house yrs ago and she said "not mine, keep it". I made a changer from a 24vac transformer, a bridge rectifier, and a load resistor. I believe it was a 18v drill and the unloaded voltage output of my makeshift "dumb" charger was around 30v.

I used that drill for a few yrs til lighter Li-Ion came out.
Old 12-01-2019, 10:59 AM
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I was very good with just simply plugging the charger in, then unplugging it in to get the burst of voltage into the battery and then letting the charger do its thing.

Every time the charger would say that the charge was complete, and it had taken longer and longer with every charge-cycle, I would plug and unplug the charger to let the shock of the initial plug-ins do what it those that had come before had said it would, and it all worked.

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