Laptop battery

The pin of the laptop is the plug that connects the adapter to the power hole. Usually round or square hole of Lenovo computer. Take most round pins as an example. Due to different models, the size of the pins varies greatly. However, according to the vast majority of adapter models on the market, there are the following more common types of sizes.

6.3mm*3.0mm, 6.0mm*1.0mm, 5.5mm*2.5mm, 5.5mm*2.1mm, 5.5mm*1.7mm, 4.8mm*1.7mm, 4mm*1.7mm, 3.5mm*1.35mm. Of course, there are others The size of the type is 7.4mm*5.0mmm, or 6.0mm*3.7mm. In short, the adapter that matches the original computer is the most correct.

6.3mm*3.0mm means the two dimensions of the pin: 6.3mm for external pins and 3.0mm for internal pins.

If you want to buy a new adapter, you need to consult the user manual or use a precision scale for measurement.

In addition, the selection of adapter pins must also be based on the same or compatible specifications of the adapter. Otherwise, even if the size is corresponding, the low output voltage adapter will cause voltage instability when charging the PC. In the slightest case, the adapter will heat up, and in severe cases, it will explode directly. In addition, if the current (amperes) is greater but the voltage is matched, it is okay. Lower current is unacceptable because it may cause the adapter to burn out or the battery to fail to charge.