The battery in the laptop is swollen: step-by-step actions and safety measures

Have you noticed that the laptop body has become deformed, and the keyboard or touchpad has begun to “stick out”? Most likely to blame swollen battery - a problem faced by device owners from Lenovo, HP, Dell and even MacBook. This is not just an inconvenience, but real threat of fire or explosion due to chemical reactions inside lithium-ion cells. In this article we will look at why this happens, how to properly remove the battery and what to do next - from diagnostics to choosing a new battery.

Don't panic, but don't put off solving the problem either. A swollen battery will not “go away on its own”: over time, the pressure inside increases, risking damage to the motherboard or causing a short circuit. We've compiled checklists, warnings and expert advice so you can act quickly and safely. And if the laptop is still under warranty, you will find out how to get a replacement without extra expenses.

Why does a laptop battery swell: 5 main reasons

Lithium-ion and lithium-polymer batteries, which are used in 99% of modern laptops, are sensitive to operating conditions. Here are the key factors that cause bloating:

• 🔋 Overheating: Working on soft surfaces (sofa, bed) blocks the ventilation openings. Temperature higher 60°C accelerates electrolyte degradation.
• ⚡ Frequent discharge-charge cycles up to 0%: Full discharge below 2.5 V on the element destroys the battery structure. This is especially critical for older laptops (for example, Asus ZenBook 2015–2017).
• ⏳ Service life: Average battery life - 300–500 cycles or 3–5 years. After this, the risk of bloating grows exponentially.
• 🔌 Using non-original chargers: Cheap power supplies (especially for Acer or MSI) may supply unstable voltage.
• 💥 Mechanical damage: Impacts or falls of the laptop disrupt the integrity of the elements, triggering chemical reactions.

Interesting fact: in MacBook Pro 2016–2017 Apple acknowledged the defective batteries and announced a free replacement program. If you have a model from this range, check the serial number on the support site Apple.

How to understand that the battery is swollen: signs and diagnostics

Sometimes the swelling is noticeable to the naked eye - the laptop body becomes “pot-bellied”, and gaps appear between the keyboard keys. But there are also less obvious symptoms:

• 🖥️ The touchpad or keyboard “plays” when pressed (as if there is emptiness under them).
• 🔌 The laptop does not turn on from the battery, but works from the network.
• 📉 Battery life has been reduced by 2–3 times (for example, from 6 hours to 1.5).
• 🔥 The case heats up more than usual, even in standby mode.

For an accurate diagnosis:

1. Turn off your laptop and turn it over.
2. Shine a flashlight along the seams of the case - the swollen battery will create a visible gap.
3. Gently press on the center of the bottom cover: if it bends like a trampoline, this is a sure sign.

powercfg /batteryreport

What to do if the battery is already swollen: step-by-step instructions

Warning: Never attempt to puncture or squeeze the battery as this may cause fire or explosion due to contact of lithium with air. Follow this algorithm:

1. Turn off the power: Unplug the charger plug from the socket and the laptop.
2. Turn off your laptop: Long press the power button for 10-15 seconds to discharge the residual current.
3. Remove the bottom cover:
   • For most models (Lenovo ThinkPad, HP Pavilion) you will need a Phillips screwdriver PH00.
   • U MacBook use a five-point screwdriver P5.
   • If the cover is glued (as in Dell XPS), heat the edges with a hairdryer at minimum temperature.
4. Disconnect the battery:
   • It is usually secured with 2-4 screws and a power cable. Carefully disconnect the connector with a plastic spudger.
   • If the battery is stuck, don’t pull it! Spray the contacts with alcohol and wait 5 minutes.

After removing, place the battery in non-flammable container (for example, a metal bucket with sand) and take it to a recycling point. Do not throw it in regular trash!

Can I use a laptop without a battery?

Yes, but with reservations. Most modern laptops (Lenovo IdeaPad, ASUS ROG, MacBook Air) can operate directly from the power supply if:

• 🔌 Used original charger with the correct voltage (eg 19.5V 3.33A for Dell Latitude).
• ⚡ The power supply capacity covers peak consumption (for gaming laptops you need a minimum 180W).
• 🖥️ The option is disabled in the BIOS Battery Health Mode (if any).

However, there are nuances:

Attention: If the laptop turns off when the charger is disconnected even for 1 second, it means that the capacitors on the motherboard are discharged. This may indicate south bridge fault (repairs will cost 5,000–20,000 rubles).

How to choose a new battery: original vs. analogue

The cost of the original battery for MacBook Pro 16" can reach 30 000 ₽, whereas the analogue from Green Cell or Camelion will cost 8 000–12 000 ₽. Here are the selection criteria:

• 🔍 Compatibility: Check the battery model (it says old) or use services like BatteryMart.
• 📊 Capacity: Optimal - no less 80% from the original (for example, for Dell Inspiron 15 original 42Wh, take an analogue no lower 38Wh).
• 🔋 Element type: Prefer cell batteries Panasonic or Samsung SDI (they last longer Lishen).
• 🛡️ Warranty: Minimum period - 12 months. From official partners (iFixit, BatteryUpgrade) warranty up to 24 months.

Beware of fakes! AliExpress sells batteries with “drawn” capacity. How to check:

1. After installation, fully charge your laptop.
2. Use the utility HWiNFO or powercfg /batteryreport to check the actual capacity.
3. Compare with the stated one: if the difference is greater 10% - demand a replacement.

How to extend the life of a new battery: 7 rules of operation

To make the new battery last longer 3–5 years, follow these guidelines:

• 🔌 Avoid 100% charge: Turn off charging 80–90% (in MacBook there is a mode Optimized Battery Charging).
• 🌡️ Control the temperature: Use a stand with a fan if the laptop gets hotter 50°C (check in HWMonitor).
• ⚡ Calibrate your battery: Once every 3 months, discharge to 5% and charge until 100%.
• 🔋 Store correctly: If you do not use your laptop for more than a month, leave the charge at 40–60% and store in a cool place (10–25°C).

For owners Windows-For laptops it is useful to configure the power plan:

1. Go to Control Panel → Power Options.
2. Select High performance and press Setting up a power plan.
3. Install Turn off display in 5 minutes and Entering sleep mode - in 15 minutes.

Attention: if you use the laptop as a desktop PC (always plugged in), remove the battery and store it separately with the charger 40–50%. This will increase its resource by 2-3 times.

Warranty and repair: how to get a free replacement

If the laptop is under warranty and the battery is swollen not your fault (for example, due to a manufacturing defect), you are entitled to a free replacement. Algorithm of actions:

1. Check the warranty period:
   • For most brands (HP, Acer, MSI) - 1 year.
   • Apple gives 1 year + extended warranty option AppleCare+.
   • In some countries (EU, USA), the battery warranty may be separate - up to 2 years.
2. Collect evidence:
   • Photo/video of a swollen battery (with the date of shooting).
   • Purchase receipt or warranty card.
   • Screenshot from powercfg /batteryreport with data on charge cycles.
3. Contact the service center:
   • For Apple — recording via support site.
   • For other brands, find the official service center on the manufacturer’s website.

If the warranty has expired, but the laptop is less than 5 years old, try writing to support with a complaint about potential batch defect. Some brands (Lenovo, Dell) meet halfway and replace the battery at a discount.

Frequently asked questions about swollen batteries