charging batteries

Hi everybody, my drone is the Inspire 2. I want to charge the Inspire 2 batteries with the „Smart charger H4“ on my car. I had a Phantom 3 and Phantom 4 and I could easily charge the batteries with my equipement (smart charger H4 connected Directory to the 12V Motor-battery). Now I tried...

This is a simple and low cost way of charging the inspire 2 batteries when travelling around. I have 8 batteries in total = 4 Flights. After the first flight I start charging 2 Batteries with my mobile charger. When finished Flight no. 4, the first batterie has been charged completely within 70...