The wing is held to the plane by rubber bands

Are you talking about gluing the wing together? The wing has a front and rear plastic cap that are fastened to the wing halves with a contact tape to keep them from sliding off the wing tube. This should hold well enough.

you cannot charge your plane lipo battery directly with a 12v battery you must use a charger especially made for lipo batteries. But the charger might be able to run off your 12v battery

It says that the RTF comes with a charger that you attach to a 12v battery or power supply

3S Balancing Li-Po Charger (EFLC3010) (included)

For others reading this . . . . here is the manual

http://www.modelflight.com.au/manual...725-Manual.pdf