With the rapid development of the global economy and the continuous improvement of people’s living standards, portable electronic products have become more and more popular, such as laptops, tablet computers, mobile phones, digital cameras, camcorders, portable DVDs, PDAs, MP3s, MP4s, GPSs, and so on. Warm equipment, health care equipment, etc.
They all use batteries, but the original battery of these devices will not be able to meet the long-term use of the device because of the low battery capacity. When traveling or traveling is the peak period of these devices, often at a critical moment the battery has no electricity, especially when the phone is on the phone, the digital camera is taking pictures, when the PSP game machine is playing, PDA is working When you wait, it makes you feel helpless and helpless. It is also not possible to allocate a spare battery for each device, which is not only costly but also inconvenient. Based on this, in order to solve this problem of people's troubles, mobile power came into being.