Scooters are a popular mode of transportation along the line of mopeds, only you drive them standing up, and they are not licensed for the road. Most people, including teens and kids, can ride around on scooters. As is the case with cars, motorcycles, and mopeds, the batteries in these scooters can die and need to be replaced, or tested and, if possible, recharged. There are several different types of scooters on the market, so you will want to refer to your own manual for the specific details of replacing and/or charging your battery.
Turn off the scooter, and make sure it is not attached to the charger or any other electronic component.
Read the owner's manual to locate and possibly uncover the scooter battery and learn what the battery's voltage is.
Locate the positive and negative polarities on the battery. The positive will be indicated by a red colour, and the negative a black colour.
Touch or attach the red clamp to the positive polar end, and the black clamp to the negative polar end.
Take a voltage reading. If the voltage is the same voltage that is indicated in the manual, then charge the battery. If it is lower, then the battery needs to be shocked. If there is no voltage at all, then the battery needs to be replaced.
Contact the manufacturer for a new battery, or purchase one wherever scooters and/or motor vehicle batteries are sold. Purchase a digital multimeter from a tool supply store or catalogue. Keep all instruction manuals close at hand.