What are the main disadvantages of the traditional battery ignition system

Hello: the traditional ignition system, the circuit breaker contact is the weakest link, when the circuit breaker contact is separated, sparks are generated between the contacts, making the contacts oxidized, erosion, and thus the circuit breaker contact has a short service life and requires frequent maintenance; the size of the contact spark is related to the size of the primary current, so that the ignition system is limited to the increase in the primary current and the secondary voltage; the size of the primary current and the secondary voltage With the increase of engine speed and the number of cylinders and decline, so that the multi-cylinder engine work at high speed is not reliable; when the spark plug carbon, due to leakage of low secondary voltage can not reliably ignition and so on.

Thanks Hope to adopt