The USB charging cable is an ideal extension to my AirAce Zoopa 150 Acme. The charging time is approximately 20 minutes, which is significantly shorter than that of the charging ability of the remote control (40 min.). In addition, it is very small and can be taken anywhere. Through the USB port can even upload it almost anywhere. For example, on a PC, TV, router, Apple charger. Just any of these devices is actually getting close and it sparrt all the batteries in the remote control. The small output of an average of 5 EURO you quickly back out.
The light goes out, it is also the charging is finished.