The Turnigy 2650mAh transmitter pack fits snugly into any Futaba or JR radio which uses a 4x4 AA cell battery configuration (see image).
It includes discharge plugs for both JR, Spektrum, and other radios.
It's built with a low C-rate long-life LiCo formula, which isn't like a standard LiPo. It retains voltage for months on end without needing a storage charge, so you can store your radio and fly once a month without worrying about discharging or recharging your pack.

With a capacity of 2650mAh, this LiPo replacement for your old NiCd or NiMH will last four to five times longer. Probably the best advantage of a LiPo transmitter battery is that it will give a true voltage reading from start to finish, which means you can say goodbye to the days when you thought your transmitter was fully charged at home, only to find the voltage drop off rapidly when at the field.

Spec.
Capacity: 2650mAh
Voltage: 11.1v
Constant discharge: 1C
Burst discharge: N/A
Weight: 157g
Size: 98x30x27mm
Plugs: Futaba, JR/Spektrum
Balance Plug: JST-XH