To measure battery capacity, you can get the battery capacity by charging or discharging. If you search for “USB voltage display” online, you can see the corresponding products. Choose such a product with a capacity display (2). ) There are ten levels or more), you can first discharge the battery to a voltage of 3.5V, and then use the charger to charge. The battery and charger are connected through this product. Once the battery is fully charged, the battery charge level. be displayed.
The other is to obtain the capacity through a simple discharge method, which is only a reference value and is not precise. When the battery is fully charged, use a charge to discharge it, for example, fully charge 4.2. V, discharge current 1A, discharge to 3.5V, and calculate the discharge time. It is not allowed to discharge below 4.2 V. The voltage diminuera and the current will also decrease, so it is only for reference. .
Accurate measurement requires a special battery capacity tester. If you are measuring as a hobbyist, you can estimate the capacity, calculate the current based on the 2-hour discharge rate, and then purchase. For an electric oven wire, the current calculation is the same. If the corresponding voltage length is intercepted proportionally, the discharge test can be carried out. Battery capacity can be calculated based on the product of discharge time and discharge current.