Please take a second to vote for your favorite helicopters here:
There are different kind of usb charging cables available. First they differ in 2 pin molex (e.g. Phantom 6010, Amewi Firestrom, …)
and the round clinker (e.g. Zoopa 150, MJX T38 [MJX 638], MJX T20 [MJX 620]) variation.