Nikken Kenko 1462 PowerMini Magnet - Small size. Giant strength. Unbelievable as it may seem, Nikken succeeded in putting advanced, patented DynaFlux® Magnetic Technology into the miniature dynamo known as the Kenko PowerMini. DynaFlux works by placing individual magnets in polar opposition, to intensify the magnetic field so that it extends farther from the surface. The result is greater field depth and 100% coverage, without requiring an increase in magnetic gauss strength.