Lind Modular Battery Charger Master Controller DECHMC-5021 - Power control unit - 19.5 V - For Dell Latitude 12, 5420, 5424,5430, 7212, 7424, 7220 Rugged Extreme.Keep your Dell Latitude Rugged Batteries fully charged with the Lind Electronics Modular Multi Bay Charger. Charge up to 16 batteries per charger with interchangeable battery bays for the Dell Latitude Rugged line of notebook and tablet computers. Lind battery chargers incorporate the highest degree of circuit protection to ensure your Dell batteries are charged properly.The Lind Electronics Modular Multi Bay Charger begins with the Master Controller (DECHMC-5021). This is powered by a single Dell compatible AC Power Adapter.