After following ALL instructions accompanying the product we still experienced run times of two thirds less than reflected in accompanying literature. Attempts to contact Razor via email was about as frustrating as I've seen anywhere. The scooter is well constructed but battery life is very problematic. This may be a "fluke" with this particular battery but the customer service response is "weak" and pretty much leaves you hanging refering you to automated problem resolution suggestions that are basically the same as those that appear in the accompanying literature. I will attempt further contact with Razor via the web and phone.