Battery charger usable with plural different power supplies

A battery charger comprising:

• a charger housing having a cradle including electrical contacts for receiving a rechargeable battery;
• a connector port on said charger housing for receiving at different times at least two electrical plug connectors having different electrical contact configurations;
• a first electrical Universal Serial Bus (USB) receptacle and a second electrical receptacle disposed in the connector port of said charger housing for receiving respectively at different times a first electrical USB plug connector and a second electrical plug connector, wherein the first electrical USB plug connector and the second electrical plug connector are respectively associated with first and second electrical power supplies;
• said first electrical USB receptacle having a contact configuration that is different from the contact configuration of said second electrical receptacle;
• said first electrical USB receptacle and said second electrical receptacle being closely adjacent each other such that an electrical plug connector inserted into one of said first electrical USB receptacle and said second electrical receptacle physically interferes with and prevents an electrical plug connector from being plugged into the other of said first electrical USB receptacle and said second electrical receptacle;
• and
• an electrical circuit disposed in said charger housing for coupling electrical power received at the first electrical USB receptacle and said second electrical receptacle to the electrical contacts of the cradle of said charger housing.