Batterys Known To Work

Zippy Flightmax 4S 3000mAh: http://www.hobbyking.com/hobbyking/store/__8852__ZIPPY_Flightmax_3000mAh_4S1P_20C_.html

2200mAh Nano-tech lipo rated at 25-50c: http://www.hobbyking.com/hobbyking/store/__11912__Turnigy_nano_tech_2200mah_4S_25_50C_Lipo_Pack.html

Thanks to: Astrowall

Photo below - one method of securing the battery in the cabin. The foam is EPP, 3mm protecting the receiver and 20mm filling the gap on right-hand side.