Who knows how to rebuild cordless tool batteries? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-13-2007, 04:33 PM   #1
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Default Who knows how to rebuild cordless tool batteries?

And where to get decent cell replacements?

At my work, we use many Bosch 14.4V cordless tools and have fried many batteries. After first having trouble finding someone who would recylce them (even Radio Shack did want them), I've decided to investigate rebuilding them myself. I could certainly use some pointers as to how to get started, as I'm no EE.

Here'* some pics of what I'm dealing with:
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Any help??
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Old 09-13-2007, 04:36 PM   #2
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Find 12 1.2v rechargable C cell batteries, wire them in series, and give it a shot? I don't know if you can find 1.2v C cells but that'* pretty much all those appear to be. This is by no means the "correct" answer, merely an assumption of the process.

*edit* you will probably want cells with a high mAh rating.
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Old 09-13-2007, 04:40 PM   #3
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The concept is right, I know that, but knowing what type of cells to use and other pertinent details could make the difference between wasting my time and accomplishing the task...you get a C+, Doug...lol.

Years ago, I knew a guy who did this stuff in his spare time, but I've lost all contact with him.

Anyone else?

*edit* You can't see in the second picture, but it says "2.0 Ah" on the casing.
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Old 09-13-2007, 04:42 PM   #4
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one thing you could do it just buy a cheap one on clearance and take the cells out if its the same size...

or Harbor Freight


But i think MCM Electronics sells them... i tring to remember the place i saw a hole bunch of them.
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Old 09-13-2007, 04:44 PM   #5
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This page loads slow. It goes over a makita pack, but they should be the same I'd think...


http://www.kichline.com/chuck/fixit/makita/Default.htm


*edit* just glimpsed the page a bit, don't see where it says to get replacement cells....
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Old 09-13-2007, 04:57 PM   #6
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Good article link, Doug! That brings your grade up to an A. It would have been an A+, but it took you two tries... :P

Anyway, that article basically summarizes by telling you that it'* a cost basis waste of time to replace the cells, but that you can "refresh" the pack if you have the proper charge method. I'm going to have to check out what the best charger type will be to keep my time down while doing this to a couple dozen battery packs. If successful, it would save us many hundreds of dollars for new battery packs.

Thanks!
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Old 09-13-2007, 04:58 PM   #7
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my dad used to make his own battery packs... i still have some of them.

you can find those generic c-cell batteries with flat tops (perfect for soldering) at most lobby stores
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Old 09-13-2007, 05:07 PM   #8
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I'm interested in the thread also since I have 5 dewalt 18 volts that have gone dead and they won't hold a charge. To replace the dewalt 18 volt XRP the cheapest I could find is $55.00 new each. How much are the Bosch 14.4V?


Any luck Mike?
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Old 09-13-2007, 05:45 PM   #9
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Ahh brother to the rescue again lol

Quote:
[16:43] dopple : ebay
[16:43] dopple : cheaper
[16:43] dopple : called "Sub-C" size batteries with tabs
[16:43] dopple : Most likely Ni-Cad
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Old 09-13-2007, 05:47 PM   #10
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Yep hobby store like towerhobbies . I used to build many battery packs for my RC cars. 6 to 7 1.2v C nicad batteries
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