What to Do If Your Phone or Computer Battery Is Swollen?

A comprehensive safety and disposal guide: why lithium-ion batteries deform, what chemical hazards they pose, and how to responsibly dispose of them in Lithuania.

Why a Deformed Battery Is a Chemical Problem, Not a Cosmetic One

On technology enthusiast forums, swollen batteries are often ironically referred to as “spicy pillows”. While the name sounds funny, in reality, it is one of the most dangerous malfunctions that can affect modern electronics. A swollen lithium-ion (Li-Ion) battery is not just a broken part that needs to be replaced – it is an unstable chemical bomb that can cause a hard-to-extinguish fire in your home, office, or waste management system.
Many users, upon seeing a raised laptop case or a detached phone screen, do not understand the extent of the danger. An even greater mistake is to simply throw such a device into the household waste bin. In this article, we will discuss the chemical processes that cause battery swelling and provide a strict action plan for safely disposing of them in Lithuania.

Electrolyte Decomposition and Gas Formation

Lithium-ion batteries operate by ions moving between the cathode and anode. However, under unfavorable conditions – as the battery ages, experiences physical shock, overheats, or due to manufacturing defects – this process is disrupted.
The liquid electrolyte inside begins to decompose (oxidation occurs). During this process, known as “gassing”, flammable gases are released: carbon dioxide, carbon monoxide, and hydrogen. Since the battery cell is hermetically sealed, the gases have nowhere to escape. They expand and swell the outer battery casing. This acts as a safety mechanism: the casing swells to contain the gases and prevent them from mixing with oxygen, which would cause spontaneous ignition.

Why This Is Strictly Prohibited and Dangerous

Throwing a damaged battery into a general waste container or even into standard battery collection boxes in stores is irresponsible.
Garbage trucks and sorting lines use powerful presses to compact waste. If the press compresses a swollen battery, its casing may rupture. The lithium inside is highly reactive: when it comes into contact with air and moisture, it triggers a reaction known as thermal runaway. This causes an intense fire that can ignite all surrounding waste. In Lithuania and worldwide, this is one of the most common causes of fires in waste management centers.

What to Do Upon Noticing Deformation

If you notice that the screen has popped off, the casing has become uneven, or you smell a specific sweet chemical odor:

• Stop Charging: Immediately unplug the charger. The electric current generates heat, which only encourages further gas release and increases the risk of explosion.
• Turn Off the Device: Completely turn off the phone or computer.
• Do Not Press: Under no circumstances should you try to “push” the battery back in or press the popped-up screen. Any mechanical pressure can puncture the cell and cause a fire.

When to Try to Remove It and When to Take It to Professionals

If the battery is user-replaceable (in older phones or devices), you can carefully remove it. However, strict rules must be followed:

• Work in a well-ventilated area or outdoors.
• Wear safety goggles and gloves.

Important: Most modern devices have batteries that are strongly glued in. Do not attempt to pry them out forcefully or use metal tools. Trying to peel off a swollen battery can damage its casing. If the battery is integrated, it is better to leave the entire device to a professional service.

Sand Bucket and Contact Protection

Once the battery is removed (or if you have a device with such a battery), do not simply leave it on a wooden table or in a drawer.

• Isolate the Contacts: If visible metal contacts are exposed, cover them with electrical tape. This will protect against short circuits.
• Non-flammable Container: Place the battery in a non-flammable container. The ideal option is a metal bucket filled with sand. Sand acts as a cushion and, in the event of a fire, helps contain the flames and absorb heat.
• Storage Conditions: Keep it in a cool, dry place, away from curtains, paper, or other flammable materials until you can take it for disposal.

DGASA Sites and Specialized Collectors

This is a critically important part. Lithuania has specific regulations for damaged batteries:

• Not in the Store Collection Box: Regular boxes in stores are meant for sealed, safe batteries. A swollen battery can be compressed with other items and cause a fire in a public place.
• Large Waste Collection Sites (DGASA): This is the safest and recommended route. Each municipality has such sites. When you take the battery, be sure to inform the staff that it is damaged/swollen. They have special containers for hazardous waste.
• Electronics Repair Shops and Recyclers: Companies like “EMP recycling” or larger electronics stores often accept old equipment. However, always first ask the staff if they can safely accept a damaged battery.