Here are some tips for storing lithium batteries:

Temperature
Store lithium batteries at a temperature between 5°C and 20°C (41°F and 68°F) in a room with low humidity. Avoid storing them in direct sunlight, in a hot car, or in freezing temperatures.

Charge
Store lithium batteries with a charge of around 50%. Check them every three months and charge them back up to 50% if needed.

Location
Store lithium batteries in a cool, dry place, away from flammable or explosive materials, and out of the reach of children. You can store them in a closed box in a dry basement, garage, or well-insulated shed.

Organisation
If you have multiple batteries, organise them by type and from oldest to newest. You can also keep written records of each battery, including its age and last charge cycle.

Charger
Store the charger separately from the battery, at a temperature between 5°C and 40°C.

Ventilation
Make sure the enclosure where you store the batteries is well-ventilated to prevent overheating. You can also consider using additional insulation during winter.

Lithium batteries contain hazardous materials and can be dangerous if stored, charged, or disposed of improperly.

Lithium-ion fires react poorly to water, so the only way to suppress them is to let them burn out or smother them.