To prevent rainwater from getting wet, the installation position of the Lithium Battery on our MC01 lithium-ion power assisted Electric Bicycle is designed below the Bike Frame. The installation of the Lithium Battery is also extremely convenient and simple. After the lithium battery is installed, you can lock the lock on the lock position of the frame with a key. Cyclists don't have to worry about lithium batteries falling or losing during cycling. Don't worry about not being able to operate or difficult to operate when replacing lithium batteries; Additionally, I would like to add a few words. If you are planning to ride a long distance, in order to prevent the lithium battery from running out of battery and replace the backup lithium battery in a timely manner, our standard configuration for replacing a high-power Lithium Battery should be a 36V14Ah Lithium Battery. If you need to replace a high-power lithium battery, you need to confirm with us whether it can be replaced to prevent damage to the power assisted E Bike caused by improper operation.