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Old 04-09-2010, 11:05 AM   #1 (permalink)
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Cordless drill nicad battery refurbishment or rejuvination?

My wife has an older 12V Black and Decker cordless drill that I handed down to her a while back, the batteries won't hold a charge any more and I'd rather not spend $30 - $40 a piece on new batteries for a drill that ain't worth $40. Is there a way to buy just the cells for the pack and replace them?

I'm working on B&D 12v PS130 battery packs BTW, they're easy as hell to take apart and it looks like replacing the cells wouldn't be hard either.

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Old 04-09-2010, 11:09 AM   #2 (permalink)
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Pull it apart. I think it's AA batteries inside.

Look up rebuilding dewalt battery packs.
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Old 04-09-2010, 11:11 AM   #3 (permalink)
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Pull it apart. I think it's AA batteries inside.

Look up rebuilding dewalt battery packs.
These aren't standard size cells that I've seen before.
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Old 04-09-2010, 11:11 AM   #4 (permalink)
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Anybody know anything about getting a Milwaulkee battery charger to charge batteries again?
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Old 04-09-2010, 11:11 AM   #5 (permalink)
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got a pic of the insides?
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Old 04-09-2010, 11:12 AM   #6 (permalink)
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These aren't standard size cells that I've seen before.
it's a Sub-C cell if you google it you'll pull up a ton of places that sell em and have directions on rebuilding packs. You can also send them in to some places to rebuild for you.
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Old 04-09-2010, 11:13 AM   #7 (permalink)
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Anybody know anything about getting a Milwaulkee battery charger to charge batteries again?
You've tried cleaning the contacts on both charger and batteries I assume?
Other than that, did you fill out the little warranty card, I still haven't on my Ridgid stuff I bought a month ago.
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Old 04-09-2010, 11:14 AM   #8 (permalink)
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You've tried cleaning the contacts on both charger and batteries I assume?
Other than that, did you fill out the little warranty card, I still haven't on my Ridgid stuff I bought a month ago.
Yea I've cleaned it. This is an old Milwaulkee set that was given to me in exchange for computer work. I'm not sure if it's the batteries or the charger, suspect it's the charger, might be both
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Old 04-09-2010, 11:16 AM   #9 (permalink)
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Here's a shot of the guts.
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Old 04-09-2010, 11:20 AM   #10 (permalink)
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Shit this thing has 10 cells in it, from what I can tell the cells are $2 - $3 each to replace them plus shipping so figure $30 in parts for new cells. I can get a brand new pack for $31 shipped.
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Old 04-09-2010, 11:25 AM   #11 (permalink)
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Replace with lithium cells!
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Old 04-09-2010, 11:25 AM   #12 (permalink)
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I read to take your mig welder and get the polarity right, turn it about 1/4- to 1/2 way, and hold it for 3-4 seconds, I did it to some old craftman batteries that would not charge at all, and it actually worked for a few months, the batteries would take a charge and last a little while, not like new, but did work. I just turned the wire feed all the way down when I did it. You may can google and find it, been over a year or so since I did it, did a dewalt battery also.
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Old 04-09-2010, 11:33 AM   #13 (permalink)
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Here's a shot of the guts.
yup, Sub-C.

get some higher amperage than what the originals were rated for, it will pay you back in spades, although it will take a little longer to charge.

make sure not to fry the heat resistor(assuming it has one)
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Old 04-09-2010, 11:34 AM   #14 (permalink)
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Replace with lithium cells!
I didn't see any black text.
you can't, the voltages are all wrong, and the charger would explode them.

Those are indeed sub c cells. They were popular among the hobbyists way back when before the lipo battery craze.
Try towerhobbies for a cheaper source. if you decide to re cell it, get the cells with tabs, it will make life a lot easier come time to solder them all back together.
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Old 04-09-2010, 11:34 AM   #15 (permalink)
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Shit this thing has 10 cells in it, from what I can tell the cells are $2 - $3 each to replace them plus shipping so figure $30 in parts for new cells. I can get a brand new pack for $31 shipped.
yeah, but they'll be shitty generic cells that may not last very long, ask me how I know

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Replace with lithium cells!
Can't charge lithiums on a regular charger.
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Old 04-09-2010, 11:35 AM   #16 (permalink)
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yeah, but they'll be shitty generic cells that may not last very long, ask me how I know
that is a very good point. THe only company making decent nicads anymore is sanyo, and a sub c high capacity sanyo is probably going to be a 5 dollar battery.
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Old 04-09-2010, 11:38 AM   #17 (permalink)
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yeah, but they'll be shitty generic cells that may not last very long, ask me how I know

Can't charge lithiums on a regular charger.

So uh.. buy another charger.


www.dealextreme.com FTW
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Old 04-09-2010, 11:57 AM   #18 (permalink)
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So uh.. buy another charger.


www.dealextreme.com FTW
he said the drill wasn't worth $40, the batteries alone are worth more than that, let alone buying a charger.

edit: and then adapting a plug to charge the battery
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Last edited by makya; 04-09-2010 at 12:00 PM.
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Old 04-09-2010, 11:59 AM   #19 (permalink)
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So uh.. buy another charger.


www.dealextreme.com FTW
and then hack it all up so he can adapt it to the battery?
you're also forgetting that you don't have enough contacts in the BW battery pack top to charge the 4 lipo cells it would take to get the 12V.

not to mention that you need a discharge controller to keep from overdischarging the lipo packs during use.

your whole idea is full of fail.
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Old 04-09-2010, 12:03 PM   #20 (permalink)
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I may just put a 12 volt cord on it with alligator clips and make a trail drill out of it, Right now it's a backup to a backup cordless drill around the house.
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Old 04-09-2010, 12:07 PM   #21 (permalink)
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Shit this thing has 10 cells in it, from what I can tell the cells are $2 - $3 each to replace them plus shipping so figure $30 in parts for new cells. I can get a brand new pack for $31 shipped.
There's a place on 242 just East of I45 that will rebuild them. They do some work for our company, and have always done good work. They use higher amp hour batteries and normally cost us about half of what a replacement would cost.

Batteries Plus (936) 321-7587
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Old 04-09-2010, 12:21 PM   #22 (permalink)
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There's a place on 242 just East of I45 that will rebuild them. They do some work for our company, and have always done good work. They use higher amp hour batteries and normally cost us about half of what a replacement would cost.

Batteries Plus (936) 321-7587
I tmust be better than the BP I used in Ca. they rebuilt one of my makita batteries, it barely fit into my drill afterwards and built up a memory in 3 months, even though i was discharging it ~ every 3 run.

When I went back they said it wouldn't be covered under warranty.
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Last edited by makya; 04-09-2010 at 12:25 PM.
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Old 04-09-2010, 05:40 PM   #23 (permalink)
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There's a place on 242 just East of I45 that will rebuild them. They do some work for our company, and have always done good work. They use higher amp hour batteries and normally cost us about half of what a replacement would cost.

Batteries Plus (936) 321-7587
This, I work for a batteries plus in NC. We rebuild them all the time. Its really easy if you can get the cells, just copy the way the cells are orientated and how they are tabbed. Spot weld the tabs and glue the cells, easy....the tower is a bitch and a half tho.

Last edited by Cr69122; 04-09-2010 at 05:41 PM.
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Old 04-09-2010, 05:52 PM   #24 (permalink)
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This, I work for a batteries plus in NC. We rebuild them all the time. Its really easy if you can get the cells, just copy the way the cells are orientated and how they are tabbed. Spot weld the tabs and glue the cells, easy....the tower is a bitch and a half tho.
do you guys use a different tube around the cell or bigger wiring or something? my battery was a bitch to get in and out of my tools after it was rebuilt.

Oh, and why don't they let you rebuild with NiMh?
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Old 04-09-2010, 05:54 PM   #25 (permalink)
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http://www.batteryjunction.com/nc-sc-2200-t.html, but the ones with tabs are backordered

I have had some REAL good results rebuilding some snap-on 7.2 packs with Titanium Innovations AAA. I will be doing my 18 volt packs with the sub-c's once they get back in stock.


Here are some 1800mah they have in stock http://www.batteryjunction.com/nc-sc-1800hd-t.html

BTW that stock pack is probably 1000mah cells.

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Oh, and why don't they let you rebuild with NiMh?
NiMh doesn't like the high discharge rates. The packs won't last near as many cycles as NiCd

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