surjer,
The one suggestion I would like to put forward here is to get yourself a better charger, funds permitting.
Reason:
Just because you put the battery on charge over night in no way tells you how much charge is in your battery. For example. you charge a battery for 10 hours on the standard charged you get with the Tx. The output of the charge is, lets say to keep it all easy, 100mah. So, if we ignore the loss durning the charge cycle in this example, you should have put 1000mah into your battery. If you have an 1000mah battery in theroy it is fully charged.
But is it?
If you have a defective cell in the pack you will not have the charge you think you have. The battery checker will give you top green if you plug it in , look at the green led, and unplug it. The ghost charge is still there. The defective cell may have some charge in it so the 4.8 volts is still present for the checker to 'see'.
result, short flight and expensive crash.

Or, I have read of one guy that later, after two wrecked planes, discovered he had a power cut during the night and so the batteries did not have the charge he thought they had.

If you get one of the charge/discharge chargers, they give a display showing the amount of current that went into your battery.
If this is very low, the battery may be faulty. Or, it may need cycled a few times.
Either way, you don't fly with it.

As I say, its only my suggestion.