Before you begin, make sure you have a plan in the event of a fire. If you have a swollen battery, take appropriate precautions.
Keep the hair dryer switched off and unplugged when not in use.
Avoid using extension cords to power your hair dryer. Since hair dryers require a high current draw, cheaper or old extension cords pose a greater fire risk.
Never heat a battery directly. If you're heating adhesive near or underneath a battery, make sure you've completely discharged the battery before applying heat.
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