Answer：According to IEC standards, batteries should be stored at a temperature of 20°C ± 5°C and a humidity of (65±20)%. For long-term storage, it is ideal to keep the battery in a dry and cool environment and to keep the remaining charge at around 50%. Of course, it is best to take the battery out once a month to ensure that it is in good condition and not to lose all the power and damage it.