What to pay attention to when charging 18650 lithium battery pack

The 18650 numbers in the 18650 lithium battery represent the external dimensions: 18 refers to the battery diameter of 18.0mm, and 650 refers to the battery height of 65.0mm. Common 18650 batteries are divided into lithium batteries, lithium iron phosphate and nickel metal hydride batteries. The voltage and capacity specification is that the voltage of the nickel-hydrogen battery is 1.2V, the common capacity is 2500MAH, and the voltage of the lithium battery is 3.6V, the common capacity is 1500MAH-3100MAH. It is generally believed that if the no-load voltage of a lithium battery is lower than 3.0V, it will run out of energy, so we must pay attention to not use it below 3.2V when using it, otherwise it will greatly benefit the battery. The life span is shortened. When using the 18650 lithium battery pack, it should be noted that 2V is the maximum limit voltage for battery charging. Under normal circumstances, what we have to ensure is that the voltage of this battery is about 4.2V when charging. When charging in practice, the pressure will rise from the initial 3.7V to 4.2V, of course, it must not continue to go up, otherwise it will damage the battery to a large extent. None of the 18650 charger manufacturers on the market is a formal manufacturer, because the 18650 battery is an industrial power lithium-ion battery, not a civilian battery. It is only available in the current retail market in the form of a spare part. Therefore, in order to save costs, many chargers only use a built-in battery protection board as the charger's protection circuit. Once the battery is overcharged for a long time, the safe charging of the battery is difficult to guarantee. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Detailed explanation of lithium battery fast charging