Fast Scooters makes them fast and last! Only fits the e200-e300,mx350 mx400,dirt quad and many more razors that were originally 24volt and now your running 36volt sla Batteries. Will not fit and razor that came factory in 36v or 48v! Inline 3 pin connector for the custom 24volt to 36volt upgrade kits and will only charge a 36volt sysytem- It does not come with the screw in end as people were tugging them off. 1)-Our new Fan cooled (avoids heat of course) charge at2.0amps and come with the proper end to plug into your charging port and works with our Razor OverVolt Kit no matter what model you have! 2) Our hi end Fan Cooled chargers are faster than stock @ (2.0 amps) 3) Our chargers have a built in TRICKLE charge which means it shuts down the fast charging system and goes into trickle charge keeping your batteries topped off so no worries about ever having a dead battery,even tho its recommended to unplug after 6 hours.. 4) Vented in one end and fan on the other to keep the charger cool during charging! . This charger features an automatic charging controller. It charges batteries more quickly at first and eventually uses a trickle charge to keep the batteries topped off.. Each charger is fully tested and the output power results are put on each charger.. Always plug your charger into your scooter first,then