Power banks are commonly used phone accessories, storing and charging electronic devices with stored energy without requiring a power source. After a period of use, many users notice the power bank swelling without a clear reason. If you're experiencing this issue, read the following article from Mytour to understand the details of the causes and appropriate solutions!
1. Why does the power bank battery swell?
Here are the common factors that cause the power bank to swell, which you should be aware of:
1.1 Prolonged Charging of Power Bank
Do you have the habit of charging your power bank for longer periods than necessary, such as overnight charging, leaving it plugged in all day, or forgetting to unplug when the battery is full? If so, this could be the reason for your power bank experiencing battery swelling.
1.2 Incorrect Charging of Power Bank
Another factor causing power bank issues, including battery swelling and rapid lifespan reduction, is improper charging. For instance, using the wrong power source, using non-original charging adapters, charging while using the power bank...

The habit of using the power bank while charging poses numerous dangers to users.
1.3 Lithium Battery Core
The electrolyte conducting electricity from the power source to the charger, and then from the charger to the device in Lithium batteries, usually exists in liquid or gel form. During charging, the electrolyte is transformed into gases such as CO2, CO, O2... accumulating inside the battery cell. If the battery cell's temperature is too high or overloaded with electricity, the power bank will swell, causing the charging body to crack and posing a severe risk of explosion.
1.4 Improper Power Bank Storage
You often place the power bank in direct contact with sunlight or have experienced instances where the power bank got wet but wasn't completely dried. All of these are the reasons behind the power bank swelling after a period of use.
1.5 Purchasing Low-Quality Power Bank Batteries
Many users end up with floating, low-quality power bank batteries made from subpar materials, lacking safety assurances. Consequently, the battery swells after just a few charging cycles.
1.6 Short Lifespan of Power Bank
Typically, manufacturers recommend using a power bank battery for around 12 months or up to 500 charging cycles (*). Beyond this period, the battery's lifespan diminishes, impacting the overall user experience. Continuing to charge may significantly increase the likelihood of the power bank swelling.
(*) This information is for reference only, as battery lifespan depends on various factors such as the power bank's battery capacity, charging efficiency, the number of charging ports, and the device's battery capacity...

The operational efficiency of the power bank battery will decline after a minimum of 500 charging cycles.
2. Is it a concern when the power bank battery swells?
Power bank swelling is a particularly hazardous issue for devices, originating from gas accumulation inside the charger. This leads to numerous undesired consequences such as sudden overheating, short usage time, prolonged charging, and a potential risk of unexpected explosions. Therefore, you need to address the swollen power bank issue promptly and correctly to ensure safety.

Is it concerning when the power bank swells? The battery cell will no longer function stably as before, so it's crucial to find solutions as early as possible.
3. Simple and Safe Ways to Handle a Swollen Power Bank Battery
If the power bank battery has swollen, consider one of the following solutions:
3.1 Warranty or Replacement at a Reputable Supplier
If the power bank battery swells within the warranty period, it's advisable to take it to the supplier for warranty services or replacement according to the regulations.
3.2 Replace with a New Power Bank Battery
Many wonder if a swollen power bank battery can be repaired. In reality, you can opt to replace the battery cell for continued use. However, the cost of battery replacement can be substantial, potentially exceeding the price of a brand-new power bank.

Handling power bank issues by replacing the battery is not recommended due to high costs.
3.3 Dispose of the Battery at Specialized Collection and Waste Processing Points
Upon noticing significant swelling in the power bank, you can contact waste collection services to dispose of electronic devices, including power bank batteries. This ensures safe disposal of the damaged battery cell, preventing hazards to those around.
3. Share Tips on Using Power Banks to Avoid Swelling and Expansion
To prolong the lifespan of your power bank, pay attention to these essential tips for usage and storage:
+ For the initial charge, users should fully charge the power bank for 10 - 12 hours. Additionally, during the first three uses, only recharge when the battery is fully depleted. Subsequently, recharge as soon as the last indicator light starts blinking.
+ Store the power bank in a dry and well-ventilated place.
+ Avoid simultaneous charging and usage of the power bank, and refrain from leaving it plugged in overnight regularly.
+ If you notice unusual heat from the power bank, immediately disconnect the power supply.
+ Use only high-quality charging cables and adapters compatible with the power bank.
+ Purchase power banks from reputable businesses to ensure quality and durability.
Mytour is the go-to destination for 100% genuine phones and phone accessories at unbeatable prices, accompanied by numerous enticing offers and reliable warranty policies. If you're looking to buy a power bank but unsure which one is good, you can consider the Delux 5200 mAh power bank, Samsung 10000 mAh power bank... or contact Mytour via the Hotline 1900 2628 for personalized assistance! |
4. Frequently Asked Questions
Surrounding the issue of a swollen power bank battery, there are many other common questions:
4.1 Does a Swollen Power Bank Battery Explode?
As you may be aware, a swollen power bank battery is prone to explosion due to gas accumulation. If you notice a swollen power bank battery, instead of continuing to charge it, take the accessory for repair at a reputable service center (if possible) or dispose of it properly immediately to ensure safety.
4.2 Is it Safe to Use a Swollen Power Bank?
Due to the significantly reduced performance and compromised safety of a swollen power bank battery, you should cease using it immediately. Additionally, avoid attempting to open or puncture the battery at home to release the accumulated gas, as it can easily lead to unintended explosions.

It's advisable to purchase a new power bank instead of continuing to use a swollen power bank battery.
4.3 Where Should You Dispose of a Power Bank with a Swollen Battery?
The optimal and safest way to handle a power bank with a swollen battery is to take it to a designated collection point. In Ho Chi Minh City, you can contact Winmart supermarkets, the People's Committee of Ward 9, District 3; the People's Committee of Ward 15, District 4; the People's Committee of Ward 17, Phu Nhuan District; the People's Committee of Ward 2, Binh Thanh District, and Metro An Phu supermarket, District 2. In Hanoi, you can dispose of electronic waste at the People's Committee of Trang Tien Ward, Nghia Tan Cultural Center, Hanoi Environmental Protection Department, the People's Committee of Quan Thanh Ward, or the People's Committee of Thanh Cong Ward.
Through the detailed information shared in the article, it is hoped that you have identified the causes of a swollen power bank battery and learned the appropriate handling methods. To ensure the longevity of electronic devices, it's essential not only to choose genuine, high-quality products but also to use and store them carefully and correctly.