2nd Battery status

                voltage                   : voltage in millivolts (uint16_t)
                current_battery           : Battery current, in 10*milliamperes (1 = 10 milliampere), -1: autopilot does not measure the current (int16_t)

def battery2_send(self, voltage, current_battery, force_mavlink1=False):
                '''
                2nd Battery status

                voltage                   : voltage in millivolts (uint16_t)
                current_battery           : Battery current, in 10*milliamperes (1 = 10 milliampere), -1: autopilot does not measure the current (int16_t)

                '''
                return self.send(self.battery2_encode(voltage, current_battery), force_mavlink1=force_mavlink1)