ORIGINAL: bryris
My battery is way up front under the fuel tank. However, there is a connector coming from the on/off switch which is accesible. Is this connector meant to charge the battery with?
Yes, it is for charging and testing the voltage of your battery. Hopefully you have a battery tester. On most of my planes I use a switch holder, such as this one:
http://www2.towerhobbies.com/cgi-bin...?&I=LXJ778&P=0
I like these, or ones like it, because they move the switch inside the plane, which protects it a bit better from exhaust, and put the charge jack in a convenient place for charging and for testing the voltage at the field.
If charging with that connector, does it matter what position the switch is in?
Yup, it matters. It is dead when the switch is on. You can see this by hooking the battery tester to it and switching on an off. You can also see if you've got the charge connector hooked to it, the little light will go on and off.
Also, I think we left the power switch on after my last flight yesterday, even though the radio was off, and this morning, nothing works. Will the battery discharge when the power switch is left on?
Most definitely. Even though the servos are not moving, the receiver and servos are using a small amount of electricity. Charge the battery and then measure the voltage to confirm the battery is ok.