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1. Open "Windows Power Shells": Press Windows key + X (or right-click the "Start" menu), and then click the "Command Prompt" option.
2. In the command prompt, copy or type the following command:
"Powercfg/battery report"
Then press Enter.
3. Then the following will display:
"The battery usage time has been saved to the file path C://Users/xx/battery-report.html."
4. Find the file location indicated in the third step. Double-click to open an html file named "battery-report.html".
5. At the end you will see the complete information of the battery, including battery report, installed batteries information, recent usage, battery usage, battery capacity history and battery life estimates.
6. Finally, you could find out the battery wear level and cycle count, such as the sample picture:Battery wear level ≈ 91.9% (31795mWh/34560mWh)
Hmmm, that looks good!
Cycle count = 56 times
How much wear level does the battery when it needs to be replaced?
Under normal circumstances, the battery should be replaced when the loss is below 80%.
Of course, if you have conditions, or you are willing to tolerate power plugging in at all times, it can be replaced at about 50%.
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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.