I road trip a lot in florida, and this is perfect. You can just connect it to the hub charger and charge all batteries at once. Also good, if it happens that you forget to charge your batteries and have to charge them on the go like i said, its a must have. I just think it should be included with the fly more combo. I wish this had come with a fly more combo, but i know i will need it for traveling. I read reviews on several lower priced third party chargers and was very concerned that cheaper chargers would damage my batteries and controller for me, its not worth the risk. I will stick with genuine dji accessories for my mavic drone. This car charger does the job without damaging my expensive batteries.

https://www.youtube.com/watch?v=u-tRfFAxD-E