First check if it's the charger or battery that was defective. Unplug your old charger, and test it with a known working charger, see if the problem gone, if yes, then you need to replace a new battery charger.
Razor E200 scooter battery charger
Razor E300 scooter battery charger

• USB quick charge 2.0 charger,you can get 75% power from empty in 30 minutes. It also charges your non-QC2.0 devices at up to 2.4 amps.ideal for travel use.
• Enjoy best product with smart IC intelligent identification your device electricity to protect your device,Intelligently detects your devices to deliver the fastest possible, while avoiding overloading, overcharging and overheating.
• QC2.0 Applicable Phones:Samsung Galaxy S6/S6 Edge/Edge+, Note5, Note 4/Edge, Nexus 6, Sony Xperia Z4, Z4 Tablet, Z3, Z3 Compact, Z3 Tablet Compact, Z2 Tablet, Motorola Droid Turbo, Moto X 2014, HTC One M9, HTC One (M8), LG G4, Asus Zenfone 2, etc.
• Convenient to Use: with stable stand, compact and portable design for the usb charger.
• Package include:1x 6-Port USB Charger,1xAC Cable,24months warranty and lifetime warmhearted consultancy.