Need some advice! Agreed to be back up vehicle in a 14 hr 1 day coast to coast cycle ride and been asked if I can do some footage on journey.

I have a mini pro 4 and usb C charger kit. 3x batteries but only gives me 90 mins give or take.

Can I charge battery pack from vehicle ?

Hi there,

If you are referring to DJI Mini 4 Pro Two-Way Charging Hub, unfortunately, this product-recommended charger is DJI 30W and DJI only has DJI 65W for the Car Charger. You can use other USB Power Delivery chargers but make sure it does not exit specifications as below ;
Watts: 30W
Input: 5 V, 3 A/9 V, 3 A/12 V, 3 A
Output (USB): 5 V, 2 A

I hope this information has helped to clarify your inquiries. If you have any other questions, kindly let us know. Thank You!