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18650 lithium battery type difference
Release time:
2022-09-30
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The standard of lithium battery is 3.7V or 4.2V. It's just that the manufacturer's label is different. 3.7V refers to the platform voltage (i.e. typical voltage) discharged during battery use, while 4.2V refers to the voltage when the battery is fully charged.
The standard of lithium battery is 3.7V or 4.2V. It's just that the manufacturer's label is different. 3.7V refers to the platform voltage (i.e. typical voltage) discharged during battery use, while 4.2V refers to the voltage when the battery is fully charged. The common rechargeable 18650 lithium battery has a voltage of 3.6 or 3.7v, and 4.2v when fully charged, which has little to do with the power (capacity). The capacity of the mainstream 18650 battery ranges from 1800mAh to 2600mAh (the capacity of the 18650 power battery mostly ranges from 2200 to 2600mAh), and the capacity of the mainstream battery even ranges from 3500 to 4000mAh.
It is generally believed that if the no-load voltage of lithium battery is lower than 3.0V, it is considered that the power is exhausted (the specific value depends on the threshold value of the battery protection board, for example, it is as low as 2.8V and as low as 3.2V). Most lithium batteries cannot be discharged with the no-load voltage below 3.2V, otherwise the excessive discharge will damage the battery (generally, lithium batteries in the market are basically used with protective plates, so the excessive discharge will also cause the protective plates to detect the battery and thus cannot charge the battery). 4.2V is the limiting voltage for battery charging. Generally, charging the no-load voltage of lithium battery to 4.2V is considered to be fully charged. During battery charging, the battery voltage gradually rises from 3.7V to 4.2V, and lithium battery charging cannot charge the no-load voltage above 4.2V, otherwise it will also damage the battery. This is the special place of lithium battery.
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