I owned my Skil 2336 driver for a year or two and it appeared to be dead; no power, no charge light. The red LED would come on when you pulled the trigger. I figured it was the battery, but could be the charger. New driver at Sears is $30. I found the battery on Ebay for $8 delivered (actually, the price was for two batteries). OK, let's blow $8 and see what happens. It was an easy fix.
You'll need a small, flat blade screw driver and a solder gun (with flux and solder, of course). The screws look like a small, special Torx drive, but the flat end screwdriver will work fine. Use the screwdriver to remove the four screws, and wiggle the "Skil" cover off (Maybe the other cover comes off just as easy... whatever!). It should look like this:
The battery is exposed. I checked it with a (cheap) volt meter and it reads about 5V DC. Strange, the new battery reads 5V. And by the way, the charger reads 14V DC. Just for the record, I could not get any voltage reading off the two charging connectors at the bottom of the handle, with either the good or bad battery.
Anyway, the battery has TABS. So it's a lot easier to solder in the new battery if you get a battery with tabs. The holes in the tabs are nice, too. The new battery I got was identified as GTL 18650 3.7V 2800mAh and don't forget "tabs".
The Pink wire is connected to the Positive (+) side. The Blue wire is connected to the Negative (-) side. I marked the battery as shown in the next picture:
The tabs on my new battery were longer than the original, so after I soldered the new battery in, I folded the tabs up on each end.
(In hind sight, the new tabs were covered with a black cover. I could have slid the cover off, snipped off the end and slid it back on before soldering.)
Before you put it together, you can try it out. My new battery came with a charge on it. There are two switches; one for the drive motor, and the other for the LED flashlight:
Check for any loose parts laying around and put the cover back on. It can be a little tricky, but it goes back on. Tighten the screws, and put on the charger.... Green light!
Speaking of "Green", please safely recycle your battery, and screw"drive" safely.