On Jun 21, 6:30�pm, wrote:
MiamiCuse wrote:
I got a cordless drill from DeWalt on a big sale two years ago I remember it
was on some clearance for $129.95 or something and it came with two
batteries.

Now the batteries will charge up in 30 minutes but will drain in much
shorter time. �I checked for new 12v ones and they are $70 a piece! �I could
not believe it.

So, first, is there anyway to "fix" the batteries.

If you're lucky, you have nothing worse than some cells that have
reversed in polarity, and they can be corrected by charging each one
individually by applying a current of approximately 50-200 mA for a
few minutes and then immediately charging the battery normally.
Shorted cells can usually be fixed, at least temporarily, by applying
some brief pulses of high current at about 30-100 volts from a
capacitor, but it's likely the shorts will grow back in a day or a
week. �I've taken the good cells from a pair of identical faulty
battery packs to make one good pack. �The cells are best attached with
a spot welder, but with a high power iron and some rosin flux, the
cells can be safely soldered together, if you work fast enough to
prevent overheating them. �When repairing a battery, use only
identical cells so each cell carries the same load. �Cells vary in
type (nicad, NiMH), capacity (a sub-C cell can range from 1,000-4,000
mA-H), and impedance (usually because some cells have plates made of
foamed metal, others of sintered metal).

http://www.primecell.com/pctools.htm

they put all new cells in your old pack, works great