18650 rechargeable battery lithium 3.7v 3500mah
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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah

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Factors affecting lithium batteries

release time:2023-06-28 Hits:     Popular:AG11 battery

  

  Lithium batteries can generally be charged and discharged 300 to 500 times. It is best to partially discharge the lithium battery instead of completely discharging it, and to avoid frequent complete discharge as much as possible. Once the battery is removed from the production line, the clock starts to move. Whether you use it or not, the lifespan of lithium batteries is only in the first few years. The decrease in battery capacity is due to an increase in internal resistance caused by oxidation (which is the main reason for the decrease in battery capacity). Finally, the resistance of the electrolytic cell will reach a certain point, even though the battery is fully charged at this time, it cannot release the stored electricity.

  The aging rate of lithium batteries is determined by temperature and charging state. The following table illustrates the reduction in battery capacity under two parameters.

  Temperature charging 40% Charging 100%

  98% capacity after one year at 0 ° C 94% capacity after one year

  25 ° C, 96% capacity after one year, 80% capacity after one year

  40 ° C 85% capacity after one year 65% capacity after one year

  60 ° C, 75% capacity after one year, 60% capacity after three months

  As shown in the figure, the high charging state and increased temperature accelerate the decrease in battery capacity.

  If possible, try to charge the battery to 40% and place it in a cool place. This can enable the battery's own protective circuit to operate for a long storage period. If the battery is placed at high temperature after being fully charged, it will cause great damage to the battery. (Therefore, when we use a fixed power supply, the battery is in a fully charged state and the temperature is generally between 25 and 30 ° C, which will damage the battery and cause its capacity to decrease)


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