How can lithium batteries be used correctly?

How can lithium batteries be used correctly?

Nowadays, almost all smartphones use lithium batteries, and many users may need to charge them several times a day. Each time the battery is fully charged, it will cause a slight degradation of the battery. Although most chargers now have the function of automatically stopping charging after the battery is fully charged, there are still some chargers that do not have these functions. Therefore, users should unplug the charger before the battery is fully charged (such as 98%, 99%), or as soon as they see it is fully charged. In addition, if you want to extend battery life, do not let the battery run out of power, and even do not let the power drop below 20%.

If the battery continues to charge even after being fully charged, such as going to sleep after plugging in the charger, it will cause a slight decrease in battery function, which will have a significant impact over the long term. Some users are accustomed to charging their phones after running out of battery, which can only be done once a month. Maintaining a battery level of 40% to 80% is an ideal range for mobile phones.

In fact, lithium batteries are not afraid of charging, but afraid of running out of battery. How to put it? Many batteries have so-called "charging management ICs" that prevent accidents caused by exceeding safe voltage during charging, and prevent low voltage from starting the charging process due to lack of power. Therefore, if a lithium battery runs out of battery and is left uncharged for a long time, it is likely to be scrapped prematurely due to low voltage. If lithium batteries are not used for a long time, it is recommended to keep 40% of the battery capacity.

In terms of usage temperature, it is also a detail that machine enthusiasts tend to overlook. If the ambient temperature during use is too low or too high, it will cause irreversible damage to the lithium battery cells. Therefore, machine enthusiasts should try to avoid using the battery in environments with harsh temperatures in daily use. For example, the Apple iPad automatically disables the charging function when the temperature is low (less than 5 degrees), which is designed to avoid damaging the battery life and performance when charging lithium batteries in low-temperature environments. If some low-quality lithium batteries are charged in low-temperature environments, it can directly cause damage to the battery cells or safety accidents.