What are the main technical parameters of 3.7 volt battery 18650?

　　1.Battery capacity

　　The capacity of a UPS battery is determined by the amount of active material in the battery, which is usually expressed in Ah or mAh. For example, the nominal capacity of 250Ah (10hr, 1.80V/cell, 25℃) refers to the capacity released by discharging at a current of 25A for 10 hours at 25℃ to reduce the voltage of a single battery to 1.80V.

　　2. Rated voltage

　　Low temperature lithium iron phosphate battery 3.2V 20A -20℃ charging, -40℃ 3C discharge capacity ≥70%

　　Charging temperature: -20~45℃ -Discharge temperature: -40~+55℃ -40℃ Support maximum discharge rate: 3C -40℃ 3C discharge capacity retention rate ≥70%

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　　The potential difference between the positive and negative terminals of the battery is called the rated voltage of the UPS battery. Common lead-acid batteries have three rated voltages: 2V, 6V, and 12V. A single lead-acid battery is 2V, and a 12V battery is made up of six single batteries connected in series.

　　The actual voltage of the battery is not a constant value. The voltage is high when there is no load, and the voltage will decrease when there is a load. When there is a sudden large current discharge, the voltage will also drop suddenly. There is an approximately linear relationship between the battery voltage and the remaining power. This simple correlation only exists under no load conditions. When a load is applied, the battery voltage is distorted by the voltage drop caused by the battery's internal impedance.

　　3. Maximum charge and discharge current

　　The battery is bidirectional and has two states, charging and discharging. This current is limited. Different batteries have different maximum charging and discharging currents.

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