How is battery capacity (mAh) calculated?

1. Battery capacity calculation method (C): Capacity C = discharged battery (constant current) I × discharge time (hours) T?

Reverse: Discharge time T = capacity C /Current discharge (constant current) I?

For example, if a battery is discharged with a constant current of 500MA (milliamp) for 2 hours, then the capacity of the battery is equal to 500MA*2H= 1000MAH =1AH. If a battery is discharged with a current of 5A for 2 hours, then the capacity of the battery is 10AH?

2. What is the voltage difference between the battery when fully charged. and when it is completely discharged? In fact, this is related to the type and type of battery. Different types of batteries are different. For example, the lithium battery used in cell phones has a nominal voltage of 3.6 and a minimum voltage of 3 V. -The acid battery is 2V and the minimum voltage is 1.75V. If heThis is a 12V lead-acid battery, the rated voltage is 12V, with a minimum of 10.5V.

< strong>Detailed information:

< p>The rechargeable battery whose capacity has been reduced can be charged by the stimulation method to restore the capacity of the rechargeable battery to its original state. The specific method is:

1. First discharge the remaining battery current. : You can use Discharge the flashlight or small bulb until the filament of the flashlight or small bulb turns red. Note: Do not let the battery voltage drop below 0.9 V while discharging.

2. Add a nanocarbon ground battery activator, then charge with 100-200mA current at 1.5 times the capacity. Then immediately use a 5-10 Ω load (small bulb or electric oven wire) to discharge.

3. ChaCharge again with 100-200mA current, charge to 1.2 times capacity, then discharge again.

4. Repeat this operation 4 to 5 times. From the third time, the charging current should not exceed 100mA, and the charging time should not exceed 1.2 times the capacity.

Using this charging method restores the original capacity of the rechargeable battery whose electrolyte has not dried up.

Reference materials:

Battery_Baidu Encyclopedia

< p >The charge and discharge voltage of lithium-ion batteries is proportional to the capacity, but there is no proportional factor. If charging the battery is compared to filling a cup of water, then the capacity is equivalent to the amount of water and the amount of water. The tension is equivalent to the height of the water surface. This cup is not as thick as others, but has a typical structurestick in an earthen pot, thin at the top and thick in the middle. The voltage curve changes quickly at the beginning and end of charging and discharging, and slowly in the middle.