FAA Part 107 Remote Pilot (UAG)OperationsMedium
During a preflight inspection, a remote pilot notices that a LiPo battery pack for the sUAS has developed a slight puffiness (swelling) in its casing. What is the correct course of action?
- ADischarge the battery completely, then recharge and use it
- BDiscontinue use of the battery and dispose of it properly
- CFully charge the battery and use it for a short flight only
- DWrap the battery in tape and continue using it as normal
Show answer & explanationAnswer & explanation
Correct answer: B. Discontinue use of the battery and dispose of it properly
Swelling in a LiPo battery indicates internal chemical breakdown or gas buildup, a known fire/explosion risk. The battery should be immediately removed from service and disposed of according to manufacturer and hazardous-material guidelines, never charged or flown.
Why the other options are wrong
- A. Discharging and recharging does not fix internal cell damage and is unsafe.
- C. Charging or flying a swollen battery increases fire/explosion risk.
- D. Taping a damaged battery does not address the internal hazard.
LiPo Battery Swelling Hazard
Swelling indicates internal cell damage or gas buildup in a lithium polymer battery, creating fire/explosion risk; such batteries must be removed from service.
- Never charge, fly, or puncture a swollen LiPo
- Store and dispose of damaged batteries per hazmat guidance
- Inspect batteries for swelling, punctures, and damage every preflight
Memory trick: 'Puffy pack, pull it back' — retire swollen batteries.