How to Revive Dead Ni-Cad Batteries Using a High Voltage Power Source

http://www.youtube.com/watch?v=ENmAJ2GOAMY&feature=player_embedded

by freerobby • 15 years ago

3 2 15 years ago

freerobby• 15 years ago

I was skeptical when I saw this, but I figured what the heck and gave it a try. Fixed two completely dead 18V DeWalt drill batteries - they now hold a charge for about 45 minutes of use (new they gave just under an hour).

Explanation (via http://ysuusy.com/easybatteryfix.html):

"Over time the crystals within a NiCd cell begin to combine and get larger. This causes them to loose capacitance and also break through the inner seals of the cell. Surging the NiCd cell using a higher voltage causes the crystals within the NiCd cell to shatter and become smaller. These smaller crystals have a greater surface area and therefore contain a greater capacitance for energy."

donnaware• 15 years ago

ya, this fix has been around a long time (came out for cell phone batteries back when cell phones used NiCad). FYI, the fix does not last, after a few charge cycles back to being dead. :(

How to Revive Dead Ni-Cad Batteries Using a High Voltage Power Source

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