Will the cell phone battery be identifiable?

February 13, 2024

The battery life of mobile phones is limited, so sometimes the phone is still good, but the battery is very useless. At this time, it is necessary to buy a new mobile phone battery. As a mobile phone user, how to choose the counterfeit and shoddy batteries that are flooding the market?
Genuine batteries usually have the following characteristics:
1. The original battery wear surface is even, using PC material, no brittle phenomenon; counterfeit battery without anti-wear surface or too rough, using recycled material, easy to crack. Or the length specified in the manual may be counterfeit.
2. All genuine mobile phone batteries should be neat in appearance, without excessive burrs, the outer surface has a certain roughness and feel comfortable; the inner surface is smooth, and fine vertical scratches can be seen under the light. Pencil traces.
3. The surface color of the battery is clear, uniform, clean, and has no obvious scratches and damages; the battery mark should be printed with the battery type, type, rated capacity, standard voltage, positive and negative signs, and manufacturer's name.
4. The label is darker in color.
5. The contact is a pure metal, matte rather than shiny.
Recently, mobile phone battery explosions have occurred frequently. Consumers need to be cautious when purchasing mobile phone batteries, pay attention to the authenticity of the battery.
High Precision Machining
High Precision Machining is defined as a process of changing the dimensions or the performance of workpiece with machining facilities.

According to the temperature of the workpiece while in machining, high precision machining can be divided into cold working and hot working. Usually, machining under indoor temperature, and won't change cause chemical change or phisical phase change is named cold working. On the other hand, if under temperature, higher or lower than room temperature, which will lead to chemical changes or phase changes, it will be called as hot working.

For high precision machining, the machining tolerance can be up to 0.0001-0.001mm, the surface finish Ra can be 0.02-0.1um.

Machining precision is to describe the actual geometrical parameter of the part after machining, such as the size, the form, the position, comparing with the theoretical geometry parameter. The difference from these two parameters is the machining tolerance. The number of the difference show the machining accuracy, the bigger, the lower of the machining precision, the smaller, the higher machining precision.
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