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-   -   Power tool batteries and maintenance (http://www.diychatroom.com/f29/power-tool-batteries-maintenance-135828/)

Albe 03-03-2012 04:20 PM

Power tool batteries and maintenance
 
Anyone else drain their niCD batteries completely before recharging them?

While liIon have no memory effect the suck when they're old and just die. I have 6 niCD batteries and they're beasts. I've had them several years and always run them in my drill with the trigger taped on till they die completely. It's a bit extreme but that's why I don't need to replace my $80 a piece batteries.

Any suggestions on a better way to discharge these batteries? They're ridgid 18volts

Al

joecaption 03-03-2012 04:24 PM

Edit edit

Yoyizit 03-03-2012 04:30 PM

Quote:

Originally Posted by Albe (Post 869388)
Any suggestions on a better way to discharge these batteries? They're ridgid 18volts

Al

A 120v, 60W incand. bulb will discharge this battery at about a 1A rate, a 100w bulb at about 2A and 30' of #30 AWG wire wrap wire will do about 6A (and get pretty hot).

woodworkbykirk 03-03-2012 07:02 PM

draining a nicad battery till its totally dead is a bad thing, once you notice a power drop in the tool it should go on the charger. i learned this years ago both from the reps with the tool companies and also from a few trade publications


lith ions can be charged at any time as they have a chip inside them which eliminates "memory"

Yoyizit 03-04-2012 03:44 PM

I've heard 80% depth of discharge (DOD) is OK.


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