#This is checking the battery stored power ratio, not sure if that's what you were looking for?
if "Battery Group 1" batteries ratio < 0.1
  rebuildBatteryGroup1
else if "Battery Group 2" batteries ratio < 0.1
  rebuildBatteryGroup2
replay

:rebuildBatteryGroup1
rotate "My Rotor" rotor to 0
wait until "My Rotor" rotor angle < 5
turn on "My Grinders" grinders
#Wait until ground down
when count of "Battery Group 1" batteries is 0
  turn off "My Grinders" grinders
turn on "My Welders" welders
#Fully built
when "Battery Group 1" batteries build ratio = 1
  turn off "My Welders" welders

:rebuildBatteryGroup2
rotate "My Rotor" rotor to 90
wait until "My Rotor" rotor angle > 85
turn on "My Grinders" grinders
#Wait until ground down
when count of "Battery Group 2" batteries is 0
  turn off "My Grinders" grinders
turn on "My Welders" welders
#Fully built
when "Battery Group 2" batteries build ratio = 1
  turn off "My Welders" welders