Good charger. I use it to charge Techlife X5 (aka Zero 8 36V) and it charges about twice as fast as the stock 1,5A charger. It has about 0,3V lower voltage than the stock charger and it shows green light exactly at 42V, the stock charger shows green light at about 42,3V. The fan is not very loud and it turns on or off based on the charger temperature. This is a must-have for this scooter as a 7 hour charging at 1,5A is so slow.