The charging unit charges my cars batteries as intended. The smart element of the device does not work as intended however. The sim card in the unit frequently fails to connect and when it does so records false data, particularly with regard to length of charging time. This can range from 50 yrs, 90 hrs, to 0 hrs. The real charging time is approx 4.5 hrs. The iPhone IOS app is a disaster. It took me 2 months of emails and phone calls before I was able to log in. It still does not work with Touch ID and consequently requires the user to remember and insert the password on every log in. Given that the data is unreliable it is rather a waste of time. Chargemaster were required by the government to bring to market a SMART charging unit by 1st July this year. They have failed to do so. The senior management of the company needs to address the failings of its IT department. They have had over 4 months to sort out the problems with both the online portal and the app. The ‘data’ team appear to be oblivious to these problems. Failure to address these failings will result in an increasing number of alienated customers, of whom I am one.