Whenever I have questions about ANY product, I search first on Amazon. They sell nearly everything now, and that's where you'll find the most user reviews, usually the most trustworthy ones, and pick up lots of tips from people who already own what you're considering buying. In addition, you can ask questions about any product, and Amazon will email everyone who bought one to see if they know the answer/want to answer the question.
Here's the link for the product you're considering:
http://www.amazon.com/Zappy-Electric-Mobility-Scooter-Pro-Flex/dp/B0051WRUI2