Hi Frank, no matter how much you post this question, the MōVI won't work properly with a li-ion v-mount battery. The motors needs to much current in fast peak situations, this fast peaks can only be covered with lipo batteries... And with heavy payload you need to change the battery at about 15.2 volts, because the motors will pull down the voltage below 14 volts when working hard. I just did a feature film with 10 shooting days with the 4k and ultraprimes... I have 8 ff batteries now ;-) Cheers, Wolf