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What to do if a lithium battery starts to swell?

April 5, 2026

Quick Answer

If a lithium battery starts to swell, it's essential to carefully remove it from the circuit, ventilate the area, and contact a fire department or a professional for assistance. Avoid touching the battery, as oils from skin can accelerate the swelling process. Never attempt to puncture or disassemble the battery.

Safety Precautions

When dealing with a swelling lithium battery, safety must be the top priority. The first step is to disconnect the battery from the circuit, but do not attempt to remove it from the device until it has been safely secured. Make sure the area around the battery is well-ventilated to prevent the buildup of flammable gases. If the swelling is severe or if you’re unsure about how to proceed, contact the local fire department or a professional with experience in handling lithium battery fires.

Identifying the Causes

In most cases, lithium battery swelling is caused by overcharging or internal electrical shorts. To prevent further damage, it’s essential to identify the root cause of the issue. Check the battery’s charging system, circuitry, and internal components for any signs of malfunction. If necessary, have the battery professionally inspected or replaced to prevent a potential fire.

Handling the Battery

If the battery has reached the point of severe swelling, it’s crucial to handle it with extreme care. Never attempt to puncture or disassemble the battery, as this can lead to an explosion. Instead, carefully wrap the battery in a heat-resistant material, such as a fire blanket or a thick towel, and move it to a safe location away from any flammable materials. Do not attempt to charge or use the battery again, as it may be irreparably damaged.

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