The RoboRIO 2 has a configurable brownout voltage (https://frcdocs.wpi.edu/en/latest/docs/software/roborio-info/roborio-brownouts.html#settable-brownou). The default is 6.75v, which is higher than necessary. This should get lowered, perhaps to 6.3 (matching RoboRIO 1), maybe 5.5 (FRCTeam3255/2025_Robot_Code#210)