XT60 connectors are widely used these days in the hobby world. Most of the batteries come with this type of XT60 connector. Best advantage with these connectors are they cannot go wrong with polarity and hence save the electrical appliance. They are made up of quality nylon / plastic. They are made from high temprature nylon. They have gold pins inside of them. Mostly they are yellow in color. They are used in applications with less than 70A of current. These can be used by remote control plane and cars.
Deans / T Connector
T Connectors are made from quality nylon which are very tough and hard to melt. Deans / T connector are mostly used in remote control cars and also in plane. Dean / T connector are generally red in color. As with XT60 they also cannot go wrong in terms of polarity thus less risk of polirity problem and hence saving your appliance.
3.5mm Bullet Connector
These are gold plated connectors of 3.5mm. These are generally used to connect the esc to to motor. But these 3.5mm bullet connector can accept high tempratures. These 3.5mm bullet connectors are widely used these days.
JST connectors are red in color. These are used in hobby world to connect from various sources to other sources. JST connectors are manufactured by japan solderless terminal. But these days every one is manufacturing. These connectors are used in low Amp applications. They are good for applications less than 40A. JST connectors are used in battereis having less than 2200mah. There are male and female connectors in these.
HXT connectors work the same way like other connectors. But they are build for high voltage application.They are used for batteries having more than 4Cell. Like wise the other connectors they also cannot be connected with reverse polarity. HXT connectors are also red in color.