Small holes in aluminum-shell capacitors can be repaired and welded by the following methods:

1, prepare capacitors, solder, solder wire, soldering iron, tweezers, multimeter and other tools.

2. Clean up the dust and impurities around the damaged place to ensure that the surface is clean and smooth during welding.

3. Gently flatten the damaged aluminum foil with tweezers to make it flush with the capacitor surface.

4. Heat the solder with an electric soldering iron, then immerse the welding wire in the solder, put the welding wire on the damaged aluminum foil, and gently press it to make it stick to the aluminum foil.

5. Wrap the welding wire around the damaged part along the aluminum foil to make it firmly fixed.

6, check whether the welding is firm, use multimeter to detect whether the capacitor is normal.