The WF-9800 Series converter/chargers are versatile, advanced power source solutions. Clean, reliable DC power is ideal for powering electronics and appliances. The 9800 Series is designed to provide clean power with or without a battery. Quiet operation is assured as the cooling fan runs only when needed. Another advantage is FCC Class B compliance, which means that the converters are designed not to cause interference with televisions, radios or other signals. Automatic three-stage battery charging maintains your battery's life with three nominal voltage output modes: 13.2 Vdc range "float" mode, 13.6 Vdc range "absorption" mode, and a 14.4 Vdc range "bulk" mode. Electronic current limiting automatically shuts down power during overload or short-circuit conditions.