I wanted to mention we will be trying out Redwing RC's RCCSKJ Power Expander on this plane. These look like they will be a great little accessory for any plane. Here are some of the features:
Dual battery sharing, evenly regulates the power used from each battery
Circuit protection: Ensures if ONE battery shorts, the other will not be drained
Higher quality switch, with higher security and stability
Integrated CDI remote cut off switch to kill your engine
Built in RX Regulator delivers a clean 5v to your RX (receiver)
Built in regulator for servos, adjustable from 4.8v to 9.7v allows you to carefully choose your voltage to your servos
Built in 30amp (40amp max) BEC provides a LARGE amp load to your servos
Digital display gives REAL time display of voltages
Audible and Light alarm to warn of low voltage (se With all these features and this price, the Power Expander Box is a great value to add to your plane.
Link to product:
http://www.redwingrc.com/index.php?main_page=product_info&cPath=3_7&products_id=82