How to Use a Welder to Save a Drill Battery

If the battery in your cordless drill has stopped working, you can use your butane welder or soldering iron to aid in the replacement of the dead battery cells located inside the battery pack. The process of replacing dead cells is straightforward and will save money as it avoids the costs of replacing he entire battery pack.

Screwdriver
Butane welder with soldering tip or soldering iron
Desolder bulb
Replacement battery cells
Solder

Instructions

- 1
  Locate the screws that secure the top half and bottom half of the battery pack. Remove them with a screwdriver. Pull the two pieces of the housing apart. The battery cells are in the bottom half of the housing.
- 2
  Label each wire that goes to each battery cell or draw a diagram. Each cell has two wires connected to it. In most cases, the individual cells are taped together to look like one large cell. If this is the case, the block of cells will have several wires coming from it.
- 3
  Heat the welder joint for each wire with the butane welder or soldering iron. If you use a butane welder, install a soldering tip on it. Suck the molten solder off the wire with a desolder bulb. Pull the wire off the battery cell.
- 4
  Lift the battery cells out of the housing and then place the new cells into the housing.
- 5
  Place each wire onto the cells. Use your guide or labels to correctly position the wires.
- 6
  Solder the wires to the cell’s terminals with the butane welder or the soldering iron.
- 7
  Reattach the top and bottom halves of the housing and secure them with the screws.

Can You Use a Reciprocating Saw to Make Plunge Cuts?

How to Repair Craftsman Cordless Drills

Remodeling Tools & Equipment