Can look here http://list.qoo10.sg/s/ELECTRIC-BICYCLE?keyword=electric+bicycle&keyword_auto_change=#none
Search for electric scooters, electric bicylces,...Many of these products are sold by domestic distributors. Would recommend getting an old fashion bicycle so that you get some exercise.
These motorized devices use a battery & you will never know how long before they break down or how long a charge will last.
I have a bicycle, and I'm exercise regularly. The electric kick scooter is for a different purpose. There are times when you want to go further than you usually do for a more satisfying meal, or drop by a bigger mall which is about a kilometre to two from your place. And most importantly, you don't want to sweat because you are in a different attire.