In view of the closeness of the activities, more and more R4M competitions were held. After the discussions within the association, the following specifications were obtained.

****R4M total voltage****

The total voltage is based on a total battery voltage of 9V for a single car (the battery must have a description of the size of the voltage) instead of the total circuit voltage.

Such as: Carbon zinc battery 1.5 volts - 6 batteries is limited, 18650 battery 3.7 volts - 2 batteries is limited, box battery 9 volts - 1 battery is limited.

This means that participants can not add the battery in parallel with no limit, and the battery must have a voltage description. The offender will not be allowed to participate contest.  Please be aware!