def Power_Calc(Vcell, i):
    """
    Calculate power.

    :param Vcell: Vcell Voltage [V]
    :type Vcell : float
    :param i: cell load current [A]
    :type i : float
    :return: cell power [W] as float
    """
    try:
        result = Vcell * i
        return result
    except TypeError:
        print(
            "[Error] Power Calculation Error (Vcell:%s, i:%s)" %
            (str(Vcell), str(i)))