First are the views from the sides, then the bottom is where the female receiving pins are (sorry, distorted, it's actually pretty straight).

It's a 3-pin connector attached (soldered) to a 3.7 volt battery for a Magellan GPS. The connector end goes into a port inside the Magellan GPS unit to act as its internal battery. Pins are +, -, and a TH which I assume means temperature sensor.

I want to connect this to a set of 1.2 volt rechargeable AA batteries since this battery is pretty much dead.

I need to know if the connector can be identified and bought.

Another question: what happens if I don't attach the TH pin to anything? Will the device still work?

 

Google computer electrcial connectors found many sites for connectors. Way to many for me to look. Here is a sitr that looks promising.
Connectors (Multi Pin) | All Electronics Corp.

 

These are typically called MOLEX connectors and come in several different styles.