How to store spare drone batteries safely

Spare packs often sit unused for weeks between trips. How they are stored has a real effect on how much capacity is left when you need them, and on how safely they behave in the air.

Store at a partial charge

Lithium batteries are happiest somewhere in the middle of their charge range. Long-term storage at 100% puts extra stress on the cells, while leaving a pack completely flat can let it drift into a deep-discharge state. Most intelligent flight batteries include a storage mode that brings the pack down to a safe level automatically — use it when you know you will not fly for a while.

Keep them cool and dry

Heat is the biggest enemy of battery life. Avoid leaving packs in a car in the sun, on a windowsill or next to a heater. A dry room at a stable temperature is better than a sealed box in a warm garage.

Check before you fly

• Inspect the casing for swelling, cracks or dents.
• Look for any smell or discoloration around the connector.
• Confirm the pack charges normally and the app reports no cell errors.
• Retire any pack that has been dropped hard or exposed to water.

Good storage habits are not complicated. A little care between flights is usually enough to keep a spare pack ready for the next shoot.