power expander question

[Trex]

I was building my robot and then one of my teammates said man if we could just have like 3 power expanders we would never have to worry about running out of battery power:cool:. So I wondered is that even legal, because I saw nothing in the rule book that said you couldn’t?

[VoltRobotics5194B]

No, the maximum amount of Power Expanders you are allowed are 1

[Trex]

No, the maximum amount of Power Expanders you are allowed are 1

Thank you for the answer.

[Highwayman]

I was building my robot and then one of my teammates said man if we could just have like 3 power expanders we would never have to worry about running out of battery power:cool:. So I wondered is that even legal, because I saw nothing in the rule book that said you couldn’t?

The rule you were looking for is in the “Robot” section of the game manual.

<R13> The only allowable sources of electrical power for a VEX Robotics Competition Robot is any single
(1) VEX 7.2V Robot Battery Pack of any type, unless the robot is utilizing the VEX Power Expander, and a
single (1) 9V backup battery. Robots utilizing the VEX Power Expander can use a second (2) VEX 7.2V
Robot Battery of any type.
a. Additional batteries cannot be used on the robot (even ones that aren’t connected).
**b. Robots are permitted to use a maximum of one (1) VEX Power Expander **
c. To ensure reliable wireless communication, it is required that all teams connect a charged 9V
Backup battery to their VEXnet system using the VEXnet Backup Battery Holder (276-2243).
d. Any VEX 7.2V Battery Pack is legal, in the quantities described above.
e. The only legal means for charging a VEX 7.2V Battery Pack is via one of the following VEX
Battery Chargers: Smart Charger, 276-1445; Smart Charger v2, 276-2519; 276-2221
(discontinued), 276-2235 (discontinued). All other chargers are strictly prohibited.
f. VEXnet Joysticks must only be powered by AAA batteries