18650 Lithium Battery Knowledge Analysis

It is generally believed that when the no-load voltage of the lithium battery is lower than 3.0V, it is considered that the electricity is used up (the specific value depends on the threshold of the battery protection board, for example, as low as 2.8V or 3.2V). Most lithium batteries cannot discharge the no-load voltage below 3.2V, otherwise excessive discharge will damage the battery (general lithium batteries on the market are basically used with protection plates, so excessive discharge will also cause the protection plate to fail to detect To the battery so that the battery cannot be charged).

4.2V is the highest limit voltage for battery charging. It is generally considered that charging the lithium battery's no-load voltage to 4.2V means that the battery is fully charged. During the battery charging process, the battery voltage gradually rises from 3.7V to 4.2V. Lithium battery charging cannot Charge the no-load voltage above 4.2V, otherwise it will damage the battery. This is the special place of the lithium battery. Generally speaking, the 18650 lithium battery has the following advantages.