After it’s removed from storage, it may require 20 minutes of charging with the original adapter before you can use it. Conversely, if you store it fully charged for an extended period of time, the battery may lose some capacity, leading to shorter battery life. If you store a device when its battery is fully discharged, the battery could fall into a deep discharge state, which renders it incapable of holding a charge.
If you want to store your device long term, two key factors will affect the overall health of your battery: the environmental temperature and the percentage of charge on the battery when it’s powered down for storage.