DISCOVER
×

How to Re-magnetize Magnets

Updated April 17, 2017

Magnets lose magnetisation over time, and this rate of loss increases with improper handling, high temperature, physical force and chipped coatings. Older magnets generally lose their magnetisation and strength of attraction. When magnets refuse to "stick" anymore, though, don't throw them away. With a strong neodymium (NdFeB, or neodymium, iron, and boron) magnet, you can easily reverse the loss and energise those batteries. After a magnetic treatment, those old magnets will back to attracting metals.

Stack an even number of neodymium, or NdFeB, magnets in a column.

Place a string running perpendicular through the two middle magnets so the magnets freely hang. The magnets will, after a short time, orient themselves north and south. North (once called "north-seeking") will be pointing north.

Rub, stroke or leave the north side of the NdFeB magnet connected to one side of the old magnet. This creates an opposite attracting force in the magnet. Repeat with the other side by using the south side of the NdFeB magnet to establish a true magnetic force in the magnet.

Tip

Utilise care with strong neodymium magnets. If they collide with magnets, they can become damaged.

Warning

Never leave magnets unattended around children. Magnets can be dangerous if swallowed. Strong magnets can bruise or break smaller bones if fingers are caught between two attracting poles.

Things You'll Need

  • High-grade neodymium magnets
  • Old magnets
bibliography-icon icon for annotation tool Cite this Article

About the Author

Writing since 2004, Darren Bonaparte has been published in "AP Unique Magazine," "The Clause Newspaper," numerous e-books and the "San Gabriel Valley Examiner." He has a double Bachelor of Arts in journalism and theater Arts from Azusa Pacific University.