Is it Tamiya or Deans? Krale Airsoft talks about the battery connectors to use for your AEGs in this video... "Connecting a battery to power your AEG airsoft replica is quite essential to make it work. But for new players and probably also a few experienced ones, there are questions about which of the two most popular connections is the better one.

Another video from Red Army Airsoft Club. For those who want to replace the Tamiya Connector to a T-Connector (also called as Dean's Connector) which should not be mistaken for the Balance Connector in a Lipoly Battery. It's a quick howto, with all the soldering involved, and you have a new connector in about 5 minutes.