Makita's advances in motor technology have led to the development of 4-pole DC motor found in the new Lithium-ion Cordless Drill Series.
While general DC motor has 2 magnetic pole, 4-pole DC motor has 4 magnetic pole.
In case of 4-pole, there are 4 line of magnetic force, which makes less space of low magnetic flux density than 2-pole, eventually this means high efficiency of energy consumption.
Also the force can make magnetic force per pole smaller, which makes magnet and yoke thinner and total weight can be reduced.
This new motor technology have led to a more compact and light weight.