一.Should I wait until the battery is depleted before charging?
There are many rumors that to make batteries more durable, it is best to wait until the battery is depleted before charging. In fact, this statement only applies to old style rechargeable batteries with obvious memory effects, and lithium batteries do not need to be charged in this way. A study has found that if a lithium battery is charged only when it is fully charged, compared to charging when there is still 20% remaining battery, the lifespan of the latter can be extended by about 50%. In addition, if the battery capacity of a lithium battery remains too low or too high for a long time, it will cause changes inside the battery and accelerate aging. Therefore, keeping the battery capacity in the middle range (such as 20% to 80%) can help extend the lifespan of the lithium battery. So we should try our best to avoid charging lithium batteries when their battery level is too low.
二.Should it be charged to full capacity frequently?
Many users are accustomed to charging to full capacity every time they charge. As mentioned earlier, long-term high battery life of lithium batteries can also accelerate their aging, so it is advisable to avoid frequently charging lithium batteries to full capacity.
三.Will fast charging accelerate the aging of lithium batteries? In recent years, many products have supported fast charging function to meet consumer needs. Compared with the general charging speed, the temperature of lithium batteries during fast charging is usually higher, and high temperature will accelerate the aging of lithium batteries. Therefore, it is generally recommended to use lower voltage and current for charging. In addition, using the product simultaneously during charging can also cause the lithium battery to overheat. Users should try to avoid using the battery during charging.
四.Should I fully charge or drain the battery before leaving it idle?
The answer is: neither of them. The long-term high or low level of battery capacity in lithium batteries can accelerate their aging. A study has found that when two lithium batteries are charged/discharged to full capacity and 40% capacity respectively, and then placed in an environment at room temperature of 25 ℃ for one year, it is found that the aging rate of the former is faster, and the capacitance decreases by about 20% after one year, while the capacitance of the latter only decreases by about 4%. Therefore, if the lithium battery or products with built-in lithium batteries will be idle for a long time, the lithium battery should be discharged or charged to a moderate level of power (such as about 40% to 50% power) before shutting down. In addition, when the battery is idle, its power will naturally drain, so it should be taken out and charged every few months to restore a moderate level of power, which helps the lithium battery maintain a "healthy" state.
I believe the issues mentioned above are of great concern to everyone. At the same time, when purchasing batteries, we should choose lithium batteries from original manufacturers or reputable brands, such as our EVE batteries（Click Go To EVE Battery detailed introduction）
