SINGAPORE – Power banks have become indispensable in our tech-driven lives, allowing us to charge devices on the go. However, experts warn that improperly used or damaged power banks can pose significant fire hazards. If you’re in the habit of keeping your power bank in your bag while charging your devices, it’s time to reconsider. Recent incidents have raised alarms regarding the safety of these gadgets. In January, a fire sparked by a power bank caused extensive damage to an Air Busan plane while it was on the tarmac in South Korea. This alarming event led numerous airlines to prohibit passengers from storing power banks in overhead compartments, citing serious safety concerns. Moreover, in March, an incident requiring 650 commuters to evacuate at Raffles Place MRT station in Singapore occurred when a woman’s power bank ignited in a train cabin, highlighting the very real risks associated with these devices.

Why Do Power Banks Catch Fire?

According to Associate Professor Sivaneasan Bala Krishnan from the Singapore Institute of Technology, power banks can catch fire due to internal defects, swelling, and reactions to temperature and pressure changes. During flights, where pressure can fluctuate greatly, the risks are particularly high. Defective or aging batteries can break down over time, generating dangerous internal heat. Furthermore, a swollen battery—often a sign of gas buildup—can rupture and release flammable gases. When power banks are stored alongside metal objects like keys or coins, exposed USB ports can create short circuits, leading to fire.

Is Your Power Bank Safe?

Assistant Professor Hung Ding Nguyen from Nanyang Technological University advises against using older or heavily utilized power banks. Signs of a problematic device include quick drainage of power, excessive heat during charging, or unusual physical signs such as deformation, hissing noises, or strange smells. If dropped or damaged, these power banks should also be retired immediately.

Best Practices for Using Power Banks

To use your power bank safely, choose well-ventilated and cool areas for operation and charging. Never charge your device inside a bag or under blankets, as this can hinder heat dissipation. Similarly, avoid placing the power bank near heating devices like laptops or smartphones, which can exacerbate the overheating risk. Avoid exposing power banks to direct sunlight or high moisture environments, like bathrooms or swimming pools, as this can lead to significant damage.

How to Maintain Your Power Bank?

To extend the lifespan of your power bank, make sure to unplug it after charging to prevent overcharging, and recharge it when the battery level falls to 20-30%. Overcharging and complete discharging can lead to internal malfunctions. Always opt for manufacturer-approved chargers to ensure proper voltage and current are used, since rapid charging can generate dangerous heat levels.

What to Look for When Buying a New Power Bank?

When shopping for a new power bank, ensure it features a reliable battery management system, overcharge protection, thermal cut-off mechanisms, and safety certifications from recognized organizations like Underwriters Laboratories (UL) or the International Electrotechnical Commission (IEC). Additionally, consider brands with accessible service centers and warranties. Experts suggest lithium-polymer batteries as a safer, slimmer option compared to standard lithium-ion types. For the most stability and lifespan, lithium iron phosphate batteries are recommended, although they may be heavier. In Singapore, the Consumer Product Safety Office (CPSO) regulates the sale of power banks, ensuring that products adhere to safety standards before being marketed. However, suppliers don't need to seek pre-market approval. As a consumer, be cautious of misleading claims; some power banks are falsely marketed as "CPSO approved."

Stay Safe!

Adherence to these guidelines can significantly reduce the fire hazards associated with power banks, keeping you and your gadgets safe. Don't let your essential tech turn into a ticking time bomb—stay informed, stay safe, and enjoy uninterrupted power on the go!