8720 9V Motor Set

8720 9V Motor Set is a TECHNIC set released in 1990. It included 57 pieces, and cost $35.99 (US). It was part of the introduction of the 9V standard to TECHNIC, replacing the earlier 4.5V standard. 
It includes a battery box for six AA-cells, a 9 volt motor, electric cables, electric plates, rubber belts and some basic TECHNIC parts.
It is the successor to 8700 Power Pack, and it can also be used as an expansion for 8094 TECHNIC Control Center
This set is referred in instruction manuals of other LEGO sets as an optional expansion to make these model move under electric power. Such as:
* 8440 Formula Flash / Formula Indy Racer
== External links ==
Category:TECHNIC
Category:Supplementary
Category:9V
Category:8000 sets
Category:1990 sets