Product Specification: Input: AC 100-240V 50/60Hz; Output: DC 42V 2A(compatible with 1.5A 1A); Connector size: 8mm. NOT fit for 24V & 25.2V & 29.4V battery. Don't use for Lead-acid battery. NOT fit for Segway Minipro, Hiboy S2 electric scooter, Gotrax, Ninebot ES3, Jetson Haze electric bike.