Don't leave in the car connected (between meetings) even if the switch is off, I have seen slow discharged lipos become unrecoverable.
Remember that you can charge, use, charge all day, run on one battery just topping up if you like, no memory effect. (second battery as backup)
When you buy a charger get one with cables to suit the battery connections, special attention to the type of balance plugs.
Lots of power and lighter !!!!!!! how you going to cope
