The portable power banks is not full of the mobile phone. This may be a problem that people who use portable power banks often encounter. Consumers think that the battery capacity is too small, so when they buy it, it starts with 20000mAh. In fact, this is not the root cause of the problem. The editor summarizes the following five points to help you understand the reasons why mobile power is not full of mobile phones.

    1. The magnitude of the current. The charging time of the portable power banks is related to the output current when the charger is charging the portable power banks. For example, if it is directly plugged into the USB port of the computer to charge the portable power banks, the time will be longer because the output current of the computer USB interface is very small. If the mobile phone charger charges the power bank, the charging speed is much faster than the computer USB.

    2. Battery capacity. When the output current is constant, the higher the capacity of the portable power banks, the longer the time required to fully charge; similarly, the capacity of the portable power banks is constant, and the smaller the output current of the charger, the longer the time required for full charging.

    3. The conversion rate is too low. Product manufacturers regard the conversion rate of a certain part of the charging process as a selling point. The conversion rate is as high as 90%, which is quite beautiful. However, it is not the actual conversion rate. Consumers should be careful. The conversion rate of a high-quality portable power banks is about 60%, but a higher conversion rate requires more powerful technology and higher investment, which is difficult for small brands to achieve. Here again, it is mentioned that a stable output current will have more fundamental significance than the conversion rate. Excessive or too small output current will have a huge adverse effect on mobile phones and other devices.

    4. Virtual capacity mark. The most costly part of the portable power banks is the battery, which ranges from a few dollars to a few cents. The more you purchase, the lower the amortized cost. When integrated into an output PCB, the cost is more than tens of dollars. The cheap ones are even less than 10 yuan. Therefore, most of the tens of thousands of milliamp products that consumers buy with dozens of dollars will have the problem of virtual capacity.

    5. The voltage is unstable. The power of the portable power banks must rise above 4.2V to charge the mobile phone battery. In addition, the USB international standard is 5V, so it is necessary to reach 5V to charge the mobile phone. If the output voltage of the product is unstable and cannot be boosted to 5V normally, the mobile phone cannot be charged.

    Everyone knows the reason why mobile power is not full of mobile phone charging, right? So how can we avoid such problems? Since it is because of product quality problems, the solution is to choose a good product. Therefore, it is recommended that you choose a product that has a high reputation, comes from a regular channel, and is at an affordable price.