What are the best options available for purchasing an e-bike kit with a battery included?

Some of the top options for buying an e-bike kit with a battery included are brands like Bafang, Tongsheng, and Swytch. These kits typically include a motor, battery, controller, and other necessary components to convert a regular bike into an electric one. You can find these kits online on websites like Amazon, eBay, and specialized e-bike retailers. Be sure to research and compare different kits to find the one that best fits your needs and budget.