Battery testing covers a range of key performance indicators, including battery capacity, nominal voltage, charge and discharge behavior, performance under extreme temperatures, as well as resistance to overcharging, over-discharging, vibration, and impact. These tests ensure that the battery meets safety and efficiency standards before it is put into use.
Batteries produced by reputable manufacturers typically have a higher actual capacity than their rated value. This allows for some flexibility, usually around 10 to 20 mAh, which can help maintain performance even under less-than-ideal conditions.
To check your phone’s battery capacity, you can use specialized software designed for this purpose. These tools provide an accurate estimation of the current battery health and capacity.
If you're conducting a manual test, make sure the process is done at a constant current. Connect a resistor with a resistance similar to that of your phone in series with an ammeter. Then, fully charge the battery (to 4.2V) and discharge it until it reaches 3.7V. Measure the current and record the time. For example, if the current is 200mA and the discharge lasts 4 hours, the battery capacity would be 200 × 4 = 800mAh.
For more accurate and reliable results, it's always best to send the battery to a professional testing facility. They have the right equipment and expertise to perform comprehensive evaluations and provide detailed reports on battery performance and longevity.
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