Battery Powered Drills

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  #1  
Old 08-20-04, 06:22 PM
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Battery Powered Drills

Has anyone had any experience buying there own drycells and replacing the worn out cells in their batterry powered drills. I have been buying new drills since the cost of whole battery replacement is so expensive and I am looking for a less costly alternative. If I pay a battery warehouse to do the job the cost of a two battery fix rivals the cost of a new drill, 2 batteries and a charger - at least a craftsman unit on sale. So I am looking for a cost efficient DIY alternative.

As a seperate issue someone ought to maket an adapter so a 16.8 volt drill can use a 14.5 volt battery etc. I have three drills that are essentially identical other than for the battery size. Today I manged to get a 12.0 volt battery into a 16.8 volt drill and it worked fine - other than the fit between the battery and the drill. Some interchangeability would be nice.

Tell me I am not alone on this subject.
 
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  #2  
Old 08-20-04, 07:01 PM
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Trying to use a battery larger than the drill calls for will likely damage the motor, and shouldn't be done.

Using a battery too small for the motor will likely cause the drill to not run at full speed, if it runs at all.
 
  #3  
Old 08-20-04, 08:34 PM
Homer Simpson
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Cost vs Cost

Vetisme,

Yer not a vet er ya?

Today the price of rechargeable drills has come down alot although the batteries haven't seen as comparable a drop in price. To cut open a
battery pack and replace the bad cell is almost not worth the time.

A note to think on.

Buy only nickel metal hydride batteries. They don't have a memory and can
be charged at any state of discharge (use).

If you are using nickel cadium batteries, it is best to discharge them completely before recharging them. You can try discharging them completely
and recharging them and go through this cycle several times. If the battery
pack is still not producing the rated voltage, you can shock them.

What happen is that a crystal grows accross the terminals shorting that cell
out. You can blast the pack with a high voltage and current and melt that
crystal bridge and the cell will take a charge. You can build one but check
around for a commercially made zapper. Say goodbye, Homer. Goodbye

PS Go to www.allelectronics.com for batteries with tabs.
 
  #4  
Old 08-20-04, 10:28 PM
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There is a lot of misinformation about batteries out there.
Here is some good information: Link

The reality is that the value of a battery powered drill is in the batteries.
For consumer grade drills, the cost of replacement batteries makes it necessary to retire the drill and replace the whole outfit.

<img src="http://www.taunton.com/finehomebuilding/media/h00106_01.jpg">
Image credit:taunton.com
 
  #5  
Old 08-21-04, 07:45 AM
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Originally Posted by vetisme
If I pay a battery warehouse to do the job the cost of a two battery fix rivals the cost of a new drill, 2 batteries and a charger - at least a craftsman unit on sale. So I am looking for a cost efficient DIY alternative.
Your problem is exactly that.. craftsman. I will NEVER buy one again. Pay a bit more and get a quality drill if that is the problem you are running into. Ridgid, Milwaukie, Dewalt, Bosch, etc are 'professional' quality. Craftsman, Black and Decker, Ryobi, etc are made for light duty.
 
  #6  
Old 08-21-04, 08:08 AM
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I've used the "hell" out of my Bosch and both the batteries and drill are still working. Sometimes I think I smell the motor burning but after all the thousands of holes and/or screws driven I think I've gotten my monies worth. Don't try to rebuild your batteries. It will cost more than just buying high quality new ones in the long run. If you are more than just a weekend DIY'er then buy professional quality battery drills, you will be repaid in the long run.
 
  #7  
Old 08-22-04, 12:19 PM
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Please respond here rather than a pm, more will learn that way...............Thanks

Tpring wrote:

"Excellent information on rechargable batteries.
I just had one of my Milwaukee batteries die, prematurely -- I will now be more mindful of my battery life/condition."

GregH writes:

I agree.

I am a heavy user of cordless drills but I find the best success with purchasing middle of the road name brands on sale and then replace the the whole outfit when the batteries fail.
Except, I own a Milwaukee 18 volt Sawzall and am faced with one failing battery.
Here those batteries are over $100.00 each and those saws never go on sale.
I may look to see if I can find an 18 volt Milwaukee drill with two batteries on sale and maybe get to upgrade my current drill and have batteries for my Sawzall at the same time.
 
  #8  
Old 08-23-04, 02:54 PM
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Thank you all for your advice. I have had Milwaukee, Dewalt and Craftsman. My best was a 12 volt craftsman. Perhaps it was simply the vagaries of use and recharging. Currently I have 5 useless drills because of replacement battery cost. Maybe the decorating / design portion of this website can come up with suggestions for their continued use. Thanks again for your very informative suggestions.
 
  #9  
Old 08-23-04, 04:45 PM
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When the batteries go bad only some of the cells inside go bad. I have had some success in taking apart several batteries and building new ones with the good cells.
 
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