Hello, power bank is a portable power supply device, which can charge digital products such as mobile phones, tablets, and notebooks. The selection of power bank needs to consider the following aspects:
Capacity: refers to the amount of electricity that can be stored in the battery inside the power bank, and the unit is milliampere-hours (mAh). The larger the capacity, the more times the power bank can charge the device, but it will also increase the weight and volume of the power bank accordingly. Generally speaking, the capacity of the power bank should be at least twice the capacity of the device's battery to ensure that it can be fully charged at least once.
Rated capacity: refers to the actual output of the power bank, and the unit is also milliampere-hours (mAh). The rated capacity will be less than the capacity because there will be a certain amount of energy loss during charging and discharging. Generally speaking, the ratio of rated capacity to capacity is 06~0.65between,Regular power bank will mark these two parameters,If only the capacity is marked,There may be a false standard。
Cells: refers to the components that store electrical energy inside the power bank, and there are two main types: 18650 cells and lithium polymer cells. The 18650 battery cell is cylindrical, with mature technology and outstanding comprehensive performance, but it is large in size, easy to heat up, and has low safety. Lithium polymer cells are flat, have high R&D costs, will not be high, smaller in size, and have higher safety, but have a shorter cycle life and higher safety. Generally speaking, lithium polymer batteries are more suitable for power banks, which have advantages in safety and portability.
Fast charging protocol: refers to the charging communication protocol between the power bank and the device, which determines the speed and efficiency of charging. Different brands and models of devices may support different fast charging protocols, such as Apple's PD protocol, Huawei's FCP SCP protocol, Xiaomi's QC protocol, etc. When choosing a power bank, pay attention to whether it is compatible with the fast charging protocol of the device, otherwise fast charging cannot be achieved and may even damage the device. Generally speaking, the fast charging power of the power bank is between 18W and 30W, and the higher the faster.
interface: refers to the input and output ports of the power bank, which determines the devices and wires that can be connected to the power bank. Generally speaking, the more interfaces of the power bank, the better, which can charge multiple devices at the same time, and can also adapt to different cables. Common interface types are Type-C, Micro-USB, Lightning, etc., pay attention to whether the interface with the device and cable matches, otherwise it will not be charged.
Housing material: refers to the external wrapping material of the power bank, which affects the appearance, feel, durability and safety of the power bank. Common housing materials are metal and plastic, metal housing is stronger and dissipates heat better, but it is also heavier and easier to scratch, plastic housing is lighter and cheaper, but it is also more prone to breakage and more flammable. Generally speaking, when choosing a shell material, you should consider your own usage habits and preferences, as well as whether the shell has flame retardant and drop resistant characteristics.
Based on the above aspects, I recommend the following power banks for you, which you can choose according to your needs and budget:
Mi Power Bank 3This is a 30000mAh large-capacity power bank, which can charge a variety of devices, supports 18W Max fast charging, has two USB-A output ports and a Type-C input and output port, the battery cell is made of lithium polymer material, and the shell is made of PC+ABS material, which has the characteristics of flame retardant and drop resistance, ** is 109 yuan.
Basemin Electric comes with a wired power bank: This is a 20000mAh medium-capacity power bank that can charge a variety of devices, supporting 20W PD fast charging and 225W super fast charging, there are two USB-A output ports and a Type-C input and output port, and it also comes with a Type-C cable and a Lightning cable, which is easy to carry and use, the battery cell is made of lithium polymer material, and the shell is made of ABS+PC material, which has the characteristics of flame retardant and drop resistance, ** is 152 yuan.
Romans magnetic wireless power bank: This is a 10000mAh small-capacity power bank, which can charge a variety of devices, supports 15W wireless charging and 20W PD fast charging, has a USB-A output port and a Type-C input and output port, and a magnetic wireless charging pad, which can be wirelessly charged for Apple mobile phones, the battery cell is made of lithium polymer material, and the shell is made of ABS+PC material, which has the characteristics of flame retardant and anti-falling, ** is 149 yuan.
The above is the power bank purchase guide I provide for you, I hope it will be helpful to you. If you have any further questions, please feel free to continue asking me.