Available chargers:

Nite Lite wall charger for Nl490 (4-volt) - NL49CH 

Nite Lite 6-volt wall charger - F66

6-volt auto (lighter) charger - No. 20

Nite Lite wall charger for Tracker and Nite Sport - 66WNMC (7.2-volt)

Nite Lite auto charger for Nl682, Nl6V8, and Wizard (with clips for older models) - 606W1 (7.2-volt)

Pictured is the 606W1 auto charger