From an additional VEX 7.2V Robot Battery or from a VEX 9.6V Transmitter Battery (only one (1)
additional battery can be used for sensor power.)
My understanding as to why Vex batteries and Vex chargers are only allowed on robots, apart from non standard means possible danger, is that they will charge to a voltage consistent for all competitors. This ensures that teams are on an even playing field. The 9.6V battery allowed for VEX U teams to run sensors would not be part of this reasoning. Could the GDC reconsider what batteries may be used for this purpose.
I found 3 old 9.6V batteries and chargers when cleaning out a bunch of old RC cars. Can I please use them to power my sensors because VEX’s transmitter batteries have been discontinued and sold out?
At this time we’re going to stick with the existing ruling. The additional options for drawing power from sensors are the VEX 7.2V and 9.6V batteries. If you’re unable to obtain a discontinued VEX 9.6V Transmitter Battery, you’ll have to rely on a VEX 7.2V Robot Battery. We will investigate alternate power options for sensor usage in VEX U for next year’s game.