If your device feels extremely hot, or smells awful, don’t attempt to remove the battery. Find a safe place and leave your device alone, keep monitor it make sure it doesn’t cause fire.
If the battery catches fire, treat it like any other small fire. If you can’t move the device, smother the fire with sand, cool the reaction with a foam, ABC, or CO2 fire extinguisher, douse it with lots of water, or cover it with a fireproof container–and then stand clear.
WARNING
Whether swollen or not, lithium-ion batteries may catch fire or explode if handled improperly. Proceed with caution and at your own risk when removing a battery from an electronic device. If you have doubts about your ability to do so safely, power down and isolate the device, and consult a professional repair technician.
Removing a swollen battery can be hazardous, but leaving a swollen battery inside a device also poses risks. To prevent potential device and bodily harm, don’t operate your device with a swollen battery. These guidelines offer best practices for removing swollen batteries, but can’t guarantee a safe repair. If you have doubts, power the device down, place it in a fireproof container, take it to a repair professional and ask them to remove the faulty battery. Don’t delay battery removal.