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[OM] Re: OT - One for our resident battery expert

Subject: [OM] Re: OT - One for our resident battery expert
From: James R <londonjames@xxxxxxxxxxx>
Date: Sun, 24 Aug 2008 17:46:47 +0100
That's why I mentioned the two 9v batteries Chris. But the guy that  
tried it got the polarity wrong and ended up fast discharging the  
NiCd. I was hoping it might work with the polarity the correct way  
round, but maybe there's not enough oomph in those small batteries to  
do the job.

James


On 24 Aug 2008, at 14:56, Chris Barker wrote:

>
> That was entertaining, James!
>
> In the comments there's a diagram showing 2 9v batteries, so someone
> has thought of it.
>
> Chris
>
> On 24 Aug 2008, at 13:23, James R wrote:
>
>> It's a holiday weekend and a few jobs on the flat need to be done. My
>> trusty cordless drill turns out to be poorly. I apparently can't  
>> get a
>> replacement battery for it for much less than the cost of a new unit
>> so I searched the net for a remedy and came up with this...
>>
>> http://www.instructables.com/id/Revive-Nicad-Batteries-by-Zapping-with-a-Welder
>>
>> My first thought is that it must be dangerous as getting between a
>> hippo and water, but enough people have commented to say that it  
>> works
>> that I'm thinking it could be worth a try. (Of course, it something
>> went wrong you may not be in any state to write anything).
>>
>> The next problem is that I don't have a welder, but maybe a car
>> battery would work. Trouble is it's a 12v drill, but as the charger
>> puts out 7.2v maybe it would?
>>
>> If voltage needs to be higher than 12 what about two small 9V
>> batteries in parallel?
>
>
>
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