All rechargeable HEINE F.O. Laryngoscope Handles can be charged in the HEINE NT 300 Charger (as well as HEINE NT 200 or NicaTron Chargers). The only exception is the Standard F.O. L LED Handle, which is not compatible with the NicaTron Charger.
Some require the use of an adaptor. For detailed information about the NT 300 Charger and adaptors please see here.