I'm hoping with both of us looking at the same thing.... will help. HERE's is the the curiosity. This magnet has x poles (more than just 1 N & S) BUT~ each poles is so small (in terms of *effective* area, as well then, in terms of *effective* power.... YES ? BUT~ a neo of the same (Dia 2.5cm) dimension with only 1 N & S arrangement has well in excess of ....... both of the above's *effectiveness* SO WHY, the 1st.... for its particular... function ? = 6volts/3watts with Dia-2cm friction wheel against a bike wheel, 26inch circumference. @ 15mph.