Firestorm Vs. Dewalt drills and other rechargable things... (Battery pack facts by Evadman)

Evadman

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Feb 18, 2001
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In case you did not know, Firestorm, Black and Decker, and Dewalt are all the same company.

Firestorm is a cheaper version of a dewalt, and Black and Decker is usually even cheaper.

Well, I found one of the reasons. If you missed a thread erlier, I asked for a few battery packs so I could rebuild them. I had a brainstorm, and remembered about the battery recycling thing at work, so I went and asked if I could have a few. ( I was fired, so it was anyting but a shre thing) My request was granted, and told I could take as many as I wanted. ( Home Depot sends them out to be recycled ) So I grabbed one 9.6, 12, 14.4, and an 18v Dewalt battery pack, along with a 12v firestorm, a 9.6 and 12v ryobi, and 2 15.6 Craftsman battery packs. ( there were still about 60 other packs, but I only wanted to see the representitive cell size, along with the packaging that holds them together. )

I tear the packs apart and realize a few things.

#1 Dewalt packs are a b!tch to take apart, Craftsman, firestorm and Ryobi are easy.
#2 The batteries in the Dewalt packs were all double shrink wrapped ( one around the cell, and another around the entire pack.
#3 The packs of the Dewalts had internal reinforcements in the form of plastic top and bottom plates which no one else had.
#4 The Firestorm pack was shrinkwrapped as a unit. The cells were wrapped in kraft paper.
#5 The Firestorm and Dewalt battery packs are externaly the same size. They can even be used interchageably in the drills. but on the inside, the firestorm batterys were sitting on a little plastic "shelf" to make up for the fact that the batteries were 2/3rds the size ( short in height. ) verses the ones in the Dewalt.

#6 The Craftsman battery packs had no reinforcement, no shrink wrap, no nothing. Just craft paper to keep the cells from internally shorting. The pack did have a tempeature diode though. I assume it is for the charger to turn off at a certain tempeature.

#7 with the exception of the Firestorm, all the cells were the exact same size ( or within 1 mm ) They were Sub C's.


So, I am now going to order some Sub C batterys so I can try to rebuild these. I found a place that sells Sub C NiMH batteries ( these are all Ni-Cad ) for $2 apiece, ( or $1.8 for Ni-Cad) but minimum is 1000 pieces. everywhere else wants $3.5-4.5 each :(

I am also going to try building one out of AAA batteries, as they are about the same height. But that is later.

Here is one question for you. How do you solder a tab to a battery? I swear these packs look like they are spot welded.

 
 

Keego

Diamond Member
Aug 15, 2000
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They probally have some kind of clamping system to solder the leads on the batteries on an assembly line.
 

Luden

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Jul 15, 2001
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I'm currently to lazy to look, but is there an equivlent for all the Dewalt products in the Firestorm/B&D line? I've always ignored them since I've never had a problem with Dewalt.
 

arcas

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Apr 10, 2001
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You might also need to examine your chargers or construct a new one if you replace the NiCad cells with NiMH...

My no-name cordless drill's charger (Harbor Freight special :)) is your run-of-the mill timer-based overnight charger. Probably C/10 though I've never measured the current (nor the capacity of the battery pack). The upshot is if I significantly increase my cell capacity, it won't yield a full charge. Also, if I decreased the cell capacity...say switching to a 1000mAH NiMH AAA from 2200 mAH SubC NiCad...it would blindly overcharge.

Sounds like at least the Craftsman charger uses temperature rise to detect a full charge so that's probably okay. I'd be concerned about the other chargers though. They might be C/10 timer-based like mine or they might try to detect the NiCad's voltage drop that indicates a full charge. The voltage drop is still there with NiMH but it's alot smaller so a NiCad charger might not detect it soon enough to prevent overcharging.

If worst comes to worst, though, it's not very difficult to build a crude C/10 charger designed for your battery pack's new capacity.
 

Evadman

Administrator Emeritus<br>Elite Member
Feb 18, 2001
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arcas: I am really expecting to do 90% dewalt packs if this actually gets off the ground. If that is so, the Dewalt packs will do NiMH without a problem. Some of their drills come with NiMH.

As for the others, they will have to get a new charger. :) I could get Ni-Cad batteries, but for the $$ I would rather get NiMH.

I would hate to have to buy batteries with tabs, they are more expensive. I would rather make them myself and save the $$ to spend on other things.