1. Current of Batteries keeping around 65% charging When you storage for long term.
2. Do not fully charge or fully discharge your battery — Keep on charge it around 65%
3. Do not place with metals. It's best to storage in a battery case.
4. Place your battery in a cool, storage to temperature is 15° C~25° C and humidness is 45%~70%. moisture-free environment which is less than 90° F (32° C).
5. Please use Battery Case to storage your batteries