I have the very same battery from the same e-bay seller. Mine is branded as Hobbymix and not ECPower but it's easy to see they are the same lipo and my label on the back says 1C charge rate.

I use a converted PC supply also and it works very well.
Here are links showing how to do it if you plan to go that route.

http://www.ehow.com/how_2189437_conv...er-supply.html
http://www.marcee.org/Articles/PCPowerSupply.htm
http://www.instructables.com/id/Conv...gular-DC-Powe/