How long did it take for the solid state health to drop from 100% to 99%?

A year and a half. Solid-state health is a system of Samsung mobile phone with its own hard disk, which indicates the damage degree of the mobile phone. After one and a half years of use, the battery will be slightly damaged, resulting in a decline in solid-state health from 100% to 99%. Solid state health consists of control unit and storage unit, which is widely used in military, vehicle, industrial control, video monitoring, network monitoring, network terminals and so on.