You should replace your battery if your battery will not charge properly.
This is how you can find out if your battery is bad: Connect your charger to the hoverboard to charge. If the green indicator light on the charger box stays green, turn the hoverboard on while the charger is still connected. If the hoverboard turns on, you would get a flashing orange battery indicator on the hoverboard. Keep the charger connected for 10 minutes. After 10 minutes, disconnect the charger while the hoverboard is on. If the hoverboard turns off then you know your battery is bad.
You can either ship it to us for repair or buy the battery and fix it yourself. Be sure to search for Samsung battery on Google and buy one and easily replace it yourself.
In order change the battery, you will have to unscrew and remove the lower part of the body. Then unscrew the 4 screws holding the battery on the frame and unplug it from the plug it is connected to. Then you can plug in the new battery and use the 4 screws to attach the battery to the frame. Now you can place the lower part of the shell back on and screw it tight.