How to fix a Dexter 3.6V electric screwdriver that does not rotate

Few days ago I was working on my new wooden planters made with recycled pallets and when I was about to screw the sides I realized that the Dexter FC36LSD electronic screwdriver was not rotating. I left it charing all night but the day after it was still not working with the same issue: the light on but it would not rotate.

At home we are trying to adopt many zero waste practices and in general we are recycling and reusing as much as possible, so I decided to fix the screwdriver. My first guess was that the battery had stopped working. I disassembled the device in order to checked and indeed the 3.6V battery cell had only charged up to 0.573V.

Replacing the battery is pretty easy. You will need:

  • A new battery. I bought a lithium 18650 type from Amazon.
  • Star screwdriver.
  • Soldering iron.
  • Tin solder wire.
  • Sander.

First remove all the screws, including those under the stickers.

Then remove the cover.

Now carefully separate the 2 covers and remove the battery pulling the battery connectors.

Here we can see the battery does not reach the required tension once completely recharged.

If you are going to solder using a soldering iron, it is very important that you previously sand the chrome part of both poles. Otherwise the tin will not be soldered.

Now you can place the 2 bumpers that came with the old battery again.

¡Ready! We need to solder the battery and place the screwdriver covers, and it works again.