AD 56205983 24V, 12A Battery Charger for Nilfisk Kent, Nilfisk Advance Floor Scrubbers. Manufactrued by a long time manufactruer of quality industrial battery chargers, Lester. This 24V, 12A SCR type battery charger is equipped with a 50A small red connector plug. Priced Each. Replaces Nilfisk Advance 56205983. Our Part Number AD 56205983.