FAQ

Charge and Discharge Regularly: Perform regular charge/discharge cycles, at least once a month, to help extend its lifespan.

Avoid Deep Discharge: Do not wait until the power bank or phone is completely dead to charge. Consistently letting the charge drop too low reduces the lithium battery's activity and accelerates capacity decay. The ideal time to start charging is when the charge drops below 15%.

Avoid Usage While Charging: Using your phone while it's connected to the power bank can impact the lifespan of both devices. More importantly, avoid answering calls while charging, as this poses a potential safety hazard.

Prevent Dropping: Be careful where you charge your power bank to prevent drops, which can cause internal or physical damage.

Choose Smart Protection: Select power banks from major manufacturers that feature smart protection mechanisms. These benefits include: overcurrent protection, short-circuit protection, over-discharge protection, voltage stabilization, and overcharge protection, which provide significant safety assurance.

Mind the Environment: Do not use the power bank in environments with high temperatures, high humidity, or excessively low temperatures.

Answer:

Damaged Components: The charging cable, port, or the power bank's internal circuit may be damaged.

Performance Degradation: The power bank's battery performance has declined due to overcharging or excessive usage.

End of Lifespan: The power bank has reached the end of its intended service life.

Solutions (Countermeasures)

Check the charging cable and ports for damage and ensure they are properly connected.

Use the original or a certified, high-quality charging cable and adapter.

Replace old, aging, or damaged power banks promptly.

Answer:

Check the Charging Cable: A common issue is poor contact or a faulty cable, especially with lower-quality cables often bundled with the power bank. Try a different charging cable to test.

Power Bank Output Fault: If changing the cable still doesn't work (or if the same cable works with other power sources), the power bank's output port or internal components likely have a defect. It is recommended to contact the vendor for after-sales service instead of attempting self-repair.

Answer

Battery Cell Degradation: If the power bank has been used for a long time, the internal battery cells (cores) will naturally experience a noticeable decline in capacity after numerous charge/discharge cycles.

Substandard Quality: If a newly purchased power bank drains quickly, it is highly likely a low-quality or counterfeit product.

False/Exaggerated Capacity or Poor Cells: If a fully charged 10,000mAh power bank can only charge a 3,000mAh phone once, the actual capacity is likely exaggerated (capacity mislabeling) or the internal cells are of very poor quality.

Using Fast Charging Ports: The charge will deplete faster when using a fast-charging port. This is normal because fast charging requires the power bank to consume more of its own power, which slightly reduces the energy conversion efficiency and makes it seem like the charge is draining quickly.

Answer:

The time required to fully charge a power bank depends mainly on its capacity, its supported input voltage/current, and the power adapter's supported voltage/current. This information is usually detailed in the power bank's user manual.

High Capacity: It is not unusual for a high-capacity power bank (e.g., 20,000mAh) to take over ten hours to fully charge.

Matching Components: If your power bank supports a high input current (e.g., 5V/2.1A), you should use a compatible power adapter that supports a correspondingly high current output to achieve the fastest charging time. The slowest component in the charging chain (adapter or cable) will determine the final speed

Answer:

Power banks typically use multiple indicator lights or a digital screen to show the remaining charge

Design Limitation: Minor inaccuracies can be due to the power bank's inherent design limitations, such as insufficient display precision.

Internal Fault: If the indicated charge differs significantly from the actual capacity, the power bank likely has an internal fault or is of poor quality.

Answer:

This phenomenon, where the charge quickly drops from a certain percentage (e.g., above 5%) to 0%, is most common in multi-cell power banks (10,000mAh or higher) with a series design.

The primary cause is poor cell matching during production (before welding), resulting in excessive differences in voltage and internal resistance among the individual cells. During discharge, one cell reaches its cutoff voltage sooner than the others. The fuel gauge IC (integrated circuit) detects that one cell has hit the limit, automatically stops the discharge process, and updates the display to 0%.

Answer:

A power bank's lifespan is primarily determined by the type of battery cell used, which dictates its cycle life.

A quick, initial assessment can be made based on volume: all else being equal, a smaller volume for the same capacity usually means a longer lifespan because it typically requires better cell materials (e.g., pure ternary or pure cobalt) to achieve higher energy density. Larger-volume products often use a Lithium Manganese Oxide ($\text{LiMn}_2\text{O}_4$) based cell.

The general definition of battery lifespan is when the capacity drops to 80% of its initial value.

Power bank cells fall into two main types based on process, using three main materials:

Answer:

For Phones: Phone batteries are usually smaller (2,500mAh - 8,000mAh). You can choose a power bank with a power output that is equal to or lower than your phone's charging power. The power bank's output is highly flexible for phones.

For Laptops: Laptop batteries are larger (8,000mAh - 30,000mAh) and require higher charging power.

Requirement: A power bank or charger with an output below 35W may not be able to activate charging on many laptops.

Selection: Choose a power bank with an output of 35W or higher and a capacity greater than 10,000mAh

Answer:

Magnetic power banks are commonly used for Apple phone wireless charging.

Apple Charging Standards:

iPhone 11 and earlier: 7.5W wireless charging.

iPhone 12 through 15 series: Upgraded to Qi2 standard (15W) wireless charging.

iPhone 16 through 17 series (projected): Expected upgrade to Qi2.2 standard (25W) wireless charging.

Selection Tip: When choosing a magnetic wireless charger for your phone, refer to whether the product has obtained the official Apple wireless charging protocol certification (e.g., MagSafe or Made for MagSafe certified accessories).