I will have iMax b3 pro compact so i want to know about charging.
Is iMax b3 pro compact charger will automatically stop charging lipo battery when lipo gets fully charged or i need to give time to lipo after fews minutes i mean i need to be attentive all the time for lipo charging.??
I will have 2200mah 3s 30c lipo so tell me the charging time which lipo will takes to be charged?

Thank you

B3 pro is a basic balance charger. It doesn't feature auto cut-off like computer based chargers.
I think o/p of this charger is 800mA
So, a 2200mAh LiPo may take around 2.5hrs.

So which charger is best for charging lipo with  have auto-cutoff function ??

Go for a more advanced charger!
Maybe a B6.