Battery care and retirement without guesswork

Inspect before charging and before flight

Give every pack its own identity in your log. Before charging, look for swelling, cracks, punctures, moisture exposure, damaged contacts, a distorted case, or a latch that no longer seats positively. Check the app or charger for warnings and, where available, cell-voltage and cycle information. A cycle count is context, not a pass/fail certificate: heat history, deep discharge, storage state, and physical damage also matter.

Do not charge a pack immediately after flight. DJI instructs users to let flight batteries cool first and to charge in a ventilated environment within the product's specified temperature range. Use the approved charger or the exact settings required by the battery maker, keep the area observable, and stop if the pack or charger behaves abnormally.

Store for the actual interval

Long storage at empty can over-discharge cells; long storage completely full can accelerate aging or swelling. Smart packs may automatically discharge after an idle period, but the target and timing differ by product. DJI's support material, for example, documents model-specific auto-discharge rules rather than one universal schedule. Read the manual for your exact battery and do not assume a pack is faulty merely because its displayed percentage fell in storage.

For a pack that will sit, use the manufacturer's storage level, keep it dry and ventilated, protect the terminals, and schedule periodic checks. Do not leave packs in a hot vehicle. If a smart pack has entered hibernation, follow its official recovery procedure; repeated attempts to force-charge a damaged or deeply depleted pack are not maintenance.

• Log pack ID, date, flight minutes, warnings, unusual voltage behavior, and damage.
• Let the pack cool before charging.
• Use model-specific storage guidance and recheck idle packs periodically.
• Keep a questionable pack physically separated and clearly marked so it cannot return to the flight bag.

Retire on evidence, not optimism

Remove a pack from flight service when it is swollen, leaking, punctured, heat-damaged, water-damaged, unable to latch securely, repeatedly reports an error, or shows materially abnormal performance compared with its own history. DJI recommends contacting support about swelling. Follow the manufacturer and local hazardous-waste authority for handling and disposal; do not put a lithium battery in ordinary trash.

Illustrative scenario: Pack B returns with much less reserve than Packs A and C on comparable short flights and later reports a cell warning. The useful response is to quarantine and investigate Pack B, not to fly it again to see whether the warning repeats. Retirement can mean removal from aircraft duty pending approved disposal; it does not mean repurposing a suspect high-energy pack on a workbench.