The magnetic force of charging treasure is weakened, so replace the built-in magnet. Xiaomi magnetic charging treasure can't use the magnetic ring, usually because the charging treasure will heat up in long-term use, which will lead to the increase of temperature, which will lead to the weakening of the built-in magnet and the inability to absorb the magnetic ring, so it is necessary to replace the built-in magnet of Xiaomi magnetic charging treasure.