Rule <R7b> states that robots may use, “Any parts which are identical to legal VEX parts. For the purposes of this rule, products which
are identical in all ways except for color are permissible,”
Rule <R13> states that, “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.”
No, these batteries would not be considered identical and would not be legal for competition usage. We’re very sensitive about safety issues when it comes to batteries, as such we’re going to be very strict when it comes to usage of official batteries, since we can verify the safety of those units.