Tekin 3400mah Lipo
 

From Tekins Site

Industry leading components and build quality
Ultrasonic welded Polycarbonate hard case
4.0mm Gold plated female High Power connection ports
4.0mm Gold plated male HP connectors with wire
Cleated bottom for a perfect fit in chassis kits with 6 cell cut outs
2.0mm balancing port and 2.0mm balance connector with wire
ROAR, BRCA legal

Voltage: 7.4v
Configuration: 2S1P
Discharge Rate: 23C
Capacity: 3400maH
Charge Rate: 2C
Length: 5.43"/138mm
Width: 1.81"/46mm
Height: 0.93"/23.5mm
Weight: 7.125oz/204g

In used condition, I restickered the top as can be seen in my Cougar here -
Only selling cause I'm now running a saddle pack :)

http://img100.imageshack.us/img100/1151/dsc0161z.jpg

£20 + postage