I will sell a battery-powered bicycle. I built my cycle with a 15-ampere lithium battery and installed hydraulic brakes. To install the hydraulic brakes, I completely changed the rear wheel and added a sensor. Even if there is no battery charge when needed, when you pedal, the cycle will run automatically. When pedaling over a flyover, the cycle will automatically go up without you having to press the accelerator. If you want, you can get one to two months of use on a single charge.