This is a popular charger that will charge the transmitter and receiver, 2 transmitters, or 2 receivers at the same time. All you need to go with it is a 12v battery and the proper connectors to go with it at the bottom of the 1st link below.

Fast Charger... http://www3.towerhobbies.com/cgi-bin...&I=LXCTZ5&P=ML

12v Battery... http://www3.towerhobbies.com/cgi-bin...&I=LXL370&P=ML

works great