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A power bank may feel warm while charging, but there is no universal touch-temperature test that proves it is safe. If yours is excessively hot, swollen, leaking, damaged, giving off an unusual smell, repeatedly disconnecting, or smoking, stop charging and using it. Keep a suspicious bank away from people and combustible materials, and follow the steps below to decide what to do next.
Why a power bank can get hot while charging
Charging and discharging involve electrical energy conversion, which can produce heat. The amount depends on the bank, the connected device, the charging conditions, and the surrounding environment. That general explanation does not establish that an unusually hot bank is safe: manufacturers’ examples apply to particular products, and there is no universal safe touch temperature for every model.
High output, a low charge, or heavy device use
Xiaomi says its 20,000 mAh integrated-cable power bank may get hotter with high power output, environmental factors, or heavy phone use; it also notes that a very low charge level can contribute to heat. Huawei describes higher current and heat when its products have a low battery level. These are product-specific explanations, not diagnostic rules for other power banks. If both your phone and bank are getting hot, reduce the phone’s workload while it is connected.
Heat buildup or a problem with a cable or connector
A bank can retain heat when it is on bedding, upholstery, or another heat-trapping surface, or when it is exposed to sunlight or another heat source. Check the cable and connectors for visible damage, and use only charging equipment suitable for the bank and consistent with its manufacturer’s instructions.
#1 Best Overall
- Huge Capacity 50000mAh Portable Charger - The 50000mAh power bank ultra-high massive capacity will keep your phone and other device running for many days！Without extra worry about low phone battery. Ideal for traveling, camping and hiking.
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- Power 3 Devices at Once - Cell phone external battery pack is equipped with 2 USB-A (22.5W output) ports, 1 USB-C (18W input/22W output) port and 1, and it can charge three devices at the same time. The portable power bank is universally compatible with all products via USB charging cable, including all iOS and Android smartphones, watch, bluetooth headsets and so on.
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What to do if your power bank is hot
If it is excessively hot or shows warning signs
- Stop charging and stop using it. Disconnect it only if you can do so safely; do not keep charging it or attach devices to test it.
- Warning signs include swelling, leakage, damage, an unusual smell, repeated disconnections, smoke, or other abnormal behavior. The Australian Competition and Consumer Commission (ACCC) advises: “Never use a power bank that is damaged, overheating, swelling, leaking or venting gas.” Read the ACCC’s power-bank safety guidance.
- Do not open, puncture, modify, or attempt to repair the battery yourself. Contact the manufacturer or an authorized service provider for instructions.
If it is warm but has no other warning signs
Disconnect it if needed and let it cool naturally in a ventilated place on a non-flammable surface. Do not put it in a refrigerator or try to cool it rapidly. Wait until it has cooled before charging again, and follow the manufacturer’s instructions.
If it is smoking or on fire
Leave the area and call your local emergency number. Do not risk injury trying to retrieve or carry a smoking battery. In Australia, ACCC guidance says to evacuate, close doors if safe, and call Triple Zero (000); use the emergency number for your location elsewhere.
Rank #2
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How to reduce charging heat
- Charge the bank on a stable, non-flammable surface with airflow around it. Avoid beds, sofas, carpets, direct sunlight, hot vehicles, and locations near heat or moisture.
- Use a suitable charger and cable, and do not use equipment that is damaged. Follow the power bank maker’s charging instructions.
- If the connected phone and bank are both getting warm, reduce demanding phone use while charging.
- Let the bank cool after use before charging it again.
- If it becomes excessively hot, swells, leaks, smells unusual, or repeatedly disconnects, stop using it and seek manufacturer or authorized-service guidance rather than repeatedly testing it.
How to check whether your power bank has been recalled
Look for the exact brand and model on the device, packaging, or manufacturer’s documentation, then compare it with current recall notices from the relevant product-safety regulator. The U.S. Consumer Product Safety Commission (CPSC) notices below are examples, not a complete recall list. Check the notice for the remedy and instructions that apply to your unit.
| Product notice | What the regulator reported | Consumer instruction |
|---|---|---|
| Yiisonger model KT-D007, CPSC warning, May 15, 2025 | 79 reports of exploding, igniting, or swelling; one serious fire with $15 million in property damage. | Stop using the bank and follow hazardous-waste disposal procedures; do not put it in household trash, general recycling, or an ordinary used-battery box. Read the CPSC Yiisonger warning. |
| Hererod models PW40 and EW40, CPSC warning, September 17, 2026 | The CPSC said the internal lithium-ion batteries can explode and ignite. | Stop using the affected bank and follow local hazardous-waste guidance. Read the CPSC Hererod warning. |
| Six AmazonBasics power-bank versions, CPSC recall, 2018 | 53 overheating reports, including one report of chemical burns and four reports of property damage. | Immediately unplug and stop using affected models, then contact Amazon for instructions. Read the CPSC AmazonBasics recall. |
How to dispose of a defective or recalled power bank
Follow the recall notice, manufacturer’s remedy, and your local hazardous-waste authority’s instructions. Do not assume that a collection point accepting ordinary batteries can take a defective lithium-ion power bank. For the Yiisonger units covered by its warning, the CPSC says: “CPSC urges consumers to immediately dispose of the defective power banks following local hazardous waste disposal procedures.” Contact the relevant local authority before transporting a defective or recalled bank, and do not put it in household trash or routine recycling unless local authorities explicitly instruct you to do so.
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Rank #4
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Rank #3
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- 【USB C Bidirectional Portable Charger】Designed with USB-C input & output, this power bank brings a great convenience. Use the same USB-C port to recharge the portable charger and power your phone, earbuds, tablet, laptop and other devices. Bidirectional charging saves time and simplifies your carry. Evopow battery pack charger portable— your smart charging solution.
- 【Charge 3 devices simultaneously】10000mAh Power bank can charge a iPhone, a Tablet and a Headphones at the same time. Lets you share battery pack with family and friends anywhere, anytime. Whether you're traveling, commuting, or just getting through a busy day, you'll never have to deal with the "which device do I charge first?" dilemma again.
- 【Your Reliable Blackout Partner】When a sudden power outage hits, panic kicks in—phones die, lose connection, and lights go out. Stay powered! This compact power bank is your emergency must-have—keeping your phone and devices charged when the power goes out. Peace of mind, right in your pocket.
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