Please keep product under the following conditions in sealed package.
Humidity: No more than 70%RH. No condensation.
Avoid any acidic or alkaline environment.
Avoid excessive external force on this product while in storage.
Even when this device is stored for a long time at 0V(on a short circuit condition) , it can be charged again.
For more details, please refer to the technical note "4.2.4 Resistant to excessive discharge".