18650 common logo
3: Capacity and voltage coding
The capacity and power will be marked on the battery, such as: 1800mAh, 2000mAh, 2200mAh, 2400mAh, 2500mAh, 2600mAh, etc. common to 18650 batteries, these are the battery capacities, and some manufacturers will spray the power corresponding capacity on the battery, such as The power of 1800mAh of 3.7V 18650 battery is 6.6wh. Some unscrupulous merchants on Taobao make use of their customers' lack of knowledge of batteries and deliberately sell power as capacity, such as 4,000mwh 18650 battery, 6000mwh 18650 battery, or even 9000mwh 18650 battery. In fact, to convert, a 3.7V 18650 battery uses mwh÷3.7V=mAh. The actual capacity of 4000mwh of 18650 is 1081mah. Everyone must keep their eyes open when buying batteries and don't be fooled by unscrupulous merchants.
The voltage code refers to the voltage of a single battery. Different materials have different positive electrode voltages, such as lithium manganese oxide (3.6V IMR), lithium cobalt oxide (3.7V/3.8V ICR), and lithium nickel cobalt manganese oxide (commonly known as ternary, 3.6V NCR). ), lithium iron phosphate (3.2V IFR), lithium titanate (2.3V/2.4V LTO). Some manufacturers mark the full-charge voltage, and some manufacturers mark the rated voltage. Different manufacturers have different voltage marking methods.