Product Details: AC Input: AC 100-240V 50/60Hz DC Output: 42V 2A(2000mA) Applicable Lithium Battery: 36V Specifications with power cord interface: Mini 3-Prong Inline Connector with 0.31in/8mm interface diamater NOTE: Does NOT fit for Razor scooter and dirt bike! Does not fit the model number: LBW11 scooter.    Indicator light: Red light means charging Green light means charge full.  Changes of indicator lights during charging process: 1. When the charger connected to the power supply, the indicator light is "green". 2. When the interface connected to the scooter and start charging, the indicator light changes from "green" to "red". 3. When the charger completed charging / full charged, the indicator light changes from "red" to "green".   If QKIIP scooter charger does not charge your scooter, there may be one of the following reasons: 1.The charger is not suitable for your scooter - （Please check the charging port and the battery volt) 2. The battery is damaged 1). Due to the limited life of lithium batteries,If your battery has been used for more than 12 months or un-used for 2-3 months, your battery might be damaged. 2). If the indicator lights lights "green" when plug in but turn off after connected with your scooter, possibly because of there is an internal short circuit of the scooter, please check your scooter battery whether is works. 3. Positive and negative(+/-) electrode correspond wrong - If the indicator lights keep "green" instead of "red" after connected the scooter, possibly because of positive and negative(+/-) electrode correspond wrong, please try to connect the charger to your scooter from different interfaces