The warranty is valid for Polini motor and battery. Do not use high-pressure water jets or jets of steam to clean the motor, screen, and battery which may cause damage or malfunction. If this happen, please contact an authorized dealer immediately. Do not use a jet of compressed air to dry the motor. The use of batteries, chargerss, and spare parts that are not specified by POLINI may result in damage or malfunction system and voiding the official warranty.