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Discussion Starter · #1 ·
Hi, colleagues.
Several years ago I had three cordless drills out of work due to their collapsed 9.6 volts batteries. The replacement batteries were very expensive or out of production.
I gathered an AC/DC transformer and a female DC connector to modify one drill. A pair of wires were soldered to each drill´s pole keeping the right polarity. I used a small shrinking sleeve to identify the positive pole. Once I tested the job I modified the other two drills.
Now they are ready to work.
Two other cordless drills are ready to be modified. More details are in the attached pictures.
 

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I repacked the NiCD cells of my 7.2V and 18V cordless drill with 3000mah NiMH cells of same size ordered from HK via ebay. They are not very expensive and one charge will last much longer than the original NiCD batteries.. Some solderings needed,
So I recommend that you try keep ONE drill as a cordless drill by repacking with Nimh cells of the same size.
 

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Discussion Starter · #3 ·
More pictures.
I repacked the NiCD cells of my 7.2V and 18V cordless drill with 3000mah NiMH cells of same size ordered from HK via ebay. They are not very expensive and one charge will last much longer than the original NiCD batteries.. Some solderings needed,
So I recommend that you try keep ONE drill as a cordless drill by repacking with Nimh cells of the same size.
Thank you Reuelt.
I agree with you. I have two Bosh cordless drills that I want to keep as they are. Here, in my country, we do not have many options to choose from to change the batteries, S&H to bring them from another country is expensive.
 

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· Marine Engineer
Doug
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4,963 Posts
Great way to extend the life of a solid tool. Your ingenuity always impresses me!


32 years ago the Zenith laptop I was using for my school assignments while I was out at Sea training got REALLY HOT. I actually deformed the plastic side turning it off and unplugging it. It turned out the 8 NiCad batteries that made up the battery bank shorted a cell. I pulled the batteries out, attempting to run just on AC, but the circuit was not set up that way. I built a little 12v DC power supply (which I still have) out of scraps I found on the ship. It got me through the next few months until I got home. The laptop was ok with a new battery and went to sea with my brother a few years later.
 
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