Answer:
1. Capacity is different: theoretical, the larger the power supply capacity, the higher the price, after all, the battery is an important part of the power supply cost;
2. The battery is very different; The reason for this phenomenon is the most important thing is that the battery is imported, and the mobile power cell is imported. There are also domestic, A products, B products and C products, and even the second-hand cells and disassembled electrical cells. The price difference is very different. ;
3. Quality of the circuit board: The high-quality circuit board not only has a charge and discharge circuit, but also overflowing the stream and other protection circuit functions. The quality of electronic components is different. Natural costs will be much different;
4. Case and Data cable quality problem: The price is of course different, and there is currently the MICRO to Type-C or Lightning Connector, depending on person, some people think that the original wire can be used by the charging equipment, does not need to turn Connector, especially the iPhone class product, the converted head in the mobile power supply is difficult to compare with the original iPhone plug, but some people think that the adapter is used to facilitate the use of each product, so it is equipped with the output line and adapter. The price is also higher.
