⚠️ Swollen Redmi 20000mAh Power Bank – Teardown & What Went Wrong?

Описание: ⚠️🔥 WARNING! A swollen power bank can be extremely dangerous! If your battery looks like this, STOP using it immediately to avoid fire or explosion risks! 🚫🔋

📸 Camera: Samsung S23 Ultra

A Redmi 20000mAh power bank bought in 2021 swelled up so much that it broke the case! In this video, I take it apart to see what’s inside and what might have caused this issue.
A lithium-ion battery can swell due to various reasons, all linked to abnormal chemical reactions inside the cells.

🔬 The Process Leading to Swelling:

1. Electrolyte Breakdown – Over time, the liquid electrolyte inside the battery can degrade, releasing gases such as carbon dioxide (CO₂), carbon monoxide (CO), and hydrogen (H₂). These gases get trapped inside the cell, causing it to expand.


2. Overcharging or Overheating – If the battery is charged beyond its limit or exposed to high temperatures, unwanted chemical reactions occur, generating gases and leading to swelling.


3. Manufacturing Defects – Some batteries have impurities or design flaws that can trigger abnormal reactions, even if the battery is used properly.


4. Battery Aging – With repeated charge and discharge cycles, the internal components degrade, increasing the risk of swelling.


5. Internal Short Circuit – If the separator between the anode and cathode gets damaged, a short circuit can occur, generating heat and gas buildup.
Swollen lithium-ion batteries can be dangerous, so if you ever notice your power bank expanding, it’s best to stop using it immediately.

Have you ever had a power bank or any other battery swell up like this? Let me know in the comments!

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