The standard method for detecting battery capacity is to use special equipment to test the battery. Capacity detection software is entirely inaccurate. The software determines the battery capacity based on the corresponding relationship between voltage and capacity. The amount of energy remaining, but this method is only applicable to new batteries. It is not accurate to measure used batteries. Currently, the false capacity standards of lithium batteries are very serious. 100% fake standards of different procedures.
The capacity of the battery made by usual manufacturers will only be higher than the nominal value and leave some margin, usually 10-20mah. If you really want to measure it, you can only do an estimated measurement, and be careful and pay attention to safety. The resistance should be similar to that of a cell phone. Simply finda resistor and discharge the fully charged battery (4.2V) to 3.7V, measure the current and record the time.
For example, if the recorded current is 200 mA and the discharge time is 4 hours, then 200x4 = 800 mAh. If it takes 5 hours, of course it will be 1000mah, which can only be estimated. Since it is necessary to ensure that the process is constant current to be accurate, special instruments are usually required to measure capacitance.
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The more the battery capacity of a mobile phone is the bigger the better. For example, if you buy a cell phone, the original battery that came with it is 1200 mA, but if you buy a new one, it may have 1500 mA, but most of them are virtual.
Battery capacity is an important benchmark for battery quality and determines to a large extentmeasures the price of the battery. Some fake batteries have fake wattage labels and even no capacity labels, and some fake batteries have unreadable labels. You can take the battery to a cell phone repair shop to measure the current to determine its authenticity. In 2013, the cell phone batteries used by everyone were lithium batteries, equipped with switching devices and protection circuits.
It therefore has a certain weight. If the lithium battery you buy is too light, it means that the battery cell capacity is insufficient and there may be a problem with the battery. Generally, the weight of a 900mAh lithium battery core is 35g. If the weight of a battery core together with other equipment and battery case is less than 35g, the battery may be fake.
Hello, the multimeter tintelligently monitors battery voltage. Set the multimeter to DC20v to measure the positive and negative battery voltages. The multimeter does not need to be oriented. The meter shows -3.87V, that means red pen. The side is the negative terminal of the battery and the black pen is the positive terminal. If it says 3.87V, then the red pen is the positive terminal and the black pen is the positive terminal. negative terminal. Capacity can be estimated by multiplying the battery size to estimate approximate capacity. For example, the battery is 5mm thick, 20mm long, 15mm wide, 3pcs. it actually depends on the quality of the battery