Samsung battery cells are one of the most reliable battery cells on the market, they offer an industry-leading 800 charging cycle life span. This reliability ensures your bike will be ready when you are, whether it is hunting, weekend riding, or daily commuting. The easy slide-on/off design allows for quick and easy removal for charging or storage. Rambo’s external battery back offers a max distance of 35 miles! Not all batteries are equal. In fact, not even close. Many e-bikes that are advertised on the market today at a certain amp-hour fall very short. Real-life tests show Rambo outperforms again and again! Don’t be fooled for less than best!