This is mainly due to the development of mobile phones. Just like the original universal charger, it has also been eliminated. Today's mobile phones are essentially all-in-one devices, meaning users can't take them apart. When there is no power, it can only be charged and it cannot be replaced by replacing the battery board.
Actually, I personally think it's a better change. If the battery cannot be replaced, it means your cell phone will be more durable, because if we often disassemble the back cover of the cell phone, it will also be harmful to the cell phone, even some irregular universal chargers can be used to charge the battery, and the battery board can easily swell. And it also provides high protection to the camera. My original cell phone had a devicephoto broken because I accidentally dropped it when replacing the electrical panel.
As for the all-in-one machine, first of all, it looks better. The elements it uses can also be diversified. It is easier for designers to design and easier to confirm during warranty. because it is integrated. It is easy to see if the machine has been dismantled by the owner. In terms of warranty, the manufacturer can also save a lot of time by talking with customers.
Lithium-ion batteries are alternatives to lithium metal batteries and are mainly composed of positive and negative electrodes, electrolytes, separators and casings. Button batteries are classified according to their shape, including cylindrical batteries, square batteries, special-shaped batteries, etc. Button batteries are divided into two categories: chemical batteries and physical batteries are the most common.t used. Button batteries are actually lithium batteries, which have the advantages of light weight, durability, high stability and long-lasting power. Lithium batteries can be divided into lithium metal batteries and lithium ion batteries. These do not contain metallic lithium and are rechargeable. Soft-pack lithium batteries are liquid lithium-ion batteries covered with a polymer shell. They have the advantages of good safety performance, light weight, large capacity, low internal resistance and flexible design.