In recent years, power banks (portable chargers) have become indispensable for our always-connected lifestyles. However, 2025 has seen an alarming surge in incidents involving exploding or overheating power banks, leading to mass recalls, aviation bans, and heightened regulatory scrutiny. From airport fire incidents to household fires caused by defective charging devices, the safety risks associated with lithium-ion batteries have never been more evident.
This blog will explore:
✔ Why power banks are exploding more frequently
✔ The science behind lithium-ion battery failures
✔ Current safety regulations and their limitations
✔ How to choose and use power banks safely
✔ The future of battery technology and safety improvement.
Many recent power bank explosions trace back to faulty lithium-ion cells from suppliers like Amprius (Wuxi), which provided substandard batteries to major brands such as Anker, Romoss, and Ugreen26. Investigations revealed:
Metal impurities in battery cells, leading to internal short circuits.
Compromised separator membranes, increasing the risk of thermal runaway (a rapid, uncontrollable temperature rise)5.
Cost-cutting measures, where manufacturers replaced high-grade materials with cheaper, unsafe alternatives6.
Lithium-ion batteries naturally generate heat during charging and discharging. However, issues arise when:
Fast charging pushes excessive current, increasing internal resistance and heat.
Poor ventilation (e.g., charging under a pillow or inside a bag) traps heat.
Physical damage (drops, punctures) can rupture battery cells, leading to leaks or fires4.
In 2025 alone, 15 in-flight power bank fires were reported, leading to emergency landings and strict bans on uncertified models1. The main risks at high altitudes include:
Low cabin pressure (~0.6 atm) increasing internal battery stress.
Temperature fluctuations exacerbating thermal runaway risks.
Not all power banks are equally risky. The key differences lie in battery chemistry and quality control.
Most common in power banks due to high energy density.
Prone to overheating if defective or misused.
Recent recalls (e.g., Anker, Romoss) highlight safety concerns35.
More stable than Li-ion, with a lower risk of leakage.
Used in premium power banks but still vulnerable to punctures.
Solid-State Batteries: No liquid electrolyte, reducing fire risks (still in development).
Graphene Batteries: Better heat dissipation, but not yet mainstream.
CCC (China Compulsory Certification): Mandatory for power banks sold in China1.
UL/CE Certification: Indicates compliance with international safety standards.
Romoss 20000mAh models (multiple fire incidents)2.
Anker A16XX series (recalled due to defective cells)3.
Overcharge/overheat protection.
Temperature monitoring (e.g., Anker’s ActiveShield 2.0)7.
Never leave charging unattended.
Avoid extreme temperatures (hot cars, direct sunlight).
Stop using if swollen or overheating.
China has suspended or revoked 5,269 power bank certifications and increased factory inspections9.
Anker recalled 1.8 million units globally3.
Romoss recalled 490,000 units in China5.
Enhanced testing for puncture, overcharging, and thermal abuse9.
A: Yes, especially if it lacks overcharge protection. Always unplug once fully charged.
A: Not necessarily—they still use lithium batteries but may include better heat management7.
A: Do not throw in regular trash. Submerge in salt water for 24+ hours before disposal5.
A: Defective cells can ignite under low cabin pressure1.
The recent wave of power bank explosions underscores the urgent need for better battery safety standards. While lithium-ion technology remains essential for portable power, consumer awareness, stricter regulations, and improved manufacturing are critical to preventing future incidents.
Key Takeaways:
✔ Buy only certified power banks (CCC, UL, CE).
✔ Avoid recalled models and check for safety recalls.
✔ Never misuse power banks (no extreme temps, physical damage, or overcharging).
✔ Dispose of damaged units safely (salt water method).
As battery technology evolves, solid-state and graphene-based alternatives may eventually eliminate these risks. Until then, staying informed is the best defense against power bank hazards.
