http://www.ionli-battery.com/electric-vehicle-lithium-ion-battery/lithium-ion-battery-for-three-wheel/ Customized Lithium Ion Battery for Three Wheel Product Information The working voltage of lithium battery for cargo electric tricycle is high. Customized AvailableCustomized Lithium Ion Battery for Three Wheel website:http://www.ionli-battery.com/electric-vehicle-lithium-ion-battery/lithium-ion-battery-for-three-wheel/