text: #
  # Open-circuit voltage in the negative (lead) electrode
  #
  import autograd.numpy as np
  
  
  def lead_ocp_Bode1977(m):
      """
      Dimensional open-circuit voltage in the negative (lead) electrode [V], from [1]_,
      as a function of the molar mass m [mol.kg-1].
  
      References
      ----------
      .. [1] H Bode. Lead-acid batteries. John Wiley and Sons, Inc., New York, NY, 1977.
  
      """
      U = (
          -0.294
          - 0.074 * np.log10(m)
          - 0.030 * np.log10(m) ** 2
          - 0.031 * np.log10(m) ** 3
          - 0.012 * np.log10(m) ** 4
      )
      return U
  