Perfect fit in the Aurora 9 and also fits in Optic 5 radio with room to spare, last 3 times longer then the stock NiMH battery.
The connector is a standard hitec connector, no need to modify anything, just charge it before use and plug in direct into the TX battery port.
UPDATE:
As of OCT 1 2012 This TrueRC battery now uses a standard JST XH connector for balance charging that is compatible with Hitec X4 or X1 AC Plus JST XH, Eflite boards and Bantam eStation EAC124 & EAC134 balance boards
You may need to purchase an adapter to use it with Hyperion or TP brand charger.
Please see this LINK if you need an adapter
