code: def get_max_capgrav(self, remove=True, insert=True):
          
          weight = self.comp.weight
          if insert:
              weight += self.max_cation_insertion * self.cation.atomic_mass
          return self._get_max_cap_ah(remove, insert) / (weight / 1000)
docs: Give max capacity in mAh/g for inserting and removing a charged cation
          Note that the weight is normalized to the most lithiated state,
          thus removal of 1 Li from LiFePO4 gives the same capacity as insertion of 1 Li into FePO4.
  
          Args:
              remove: (bool) whether to allow cation removal
              insert: (bool) whether to allow cation insertion
  
          Returns:
              max grav capacity in mAh/g