How to Extend The Service Life of Lithium Batteries (I)?
(1) Some early rechargeable batteries, such as nickel-cadmium batteries, have a memory effect. If the battery is not used up and start charging, then the next time it is discharged and limited to this level, it can no longer be discharged deeper, resulting in a decrease in battery capacity; if the battery is not fully charged, it starts to discharge, then the next time the charge will be limited charged to that non-full level, It can’t be fully charged, which also leads to a decrease in capacity. Therefore, for nickel-cadmium batteries and other batteries that have a memory effect, the best way to use them is to recharge them when they are used up and use them when they are full. Lithium batteries do not have this effect. On the contrary, charging the lithium battery to a full charge will greatly damage the capacity of the lithium battery. Therefore, lithium batteries do not need to be fully charged.
(2) Lithium batteries are extremely harmful whether they are overcharged or over-discharged. If it is overcharged, it will permanently damage the capacity of the lithium battery; if it is overcharged, there will be a risk of explosion. However, there is no danger of overcharging if the lithium battery device is plugged in overnight because these devices will stop charging or reduce the current to a minimum when they are fully charged (only to make up for a small amount of power consumption overnight).
(3) The life of a lithium battery is related to the charging current (or charging rate). Therefore, it can be said that the life of a lithium battery is related to the power supply. Generally speaking, the service life of lithium batteries will be less if fast charging is used. However, as long as the current does not exceed the amount of full charge in 1 hour, the charging rate has no significant impact on life. The only “problem” when using power banks, computer USB ports, etc., is that the power supply current is relatively small and the charging is slow; for the battery life, this is not harmful. Except for extremely inferior chargers, the current equipment basically does not pick up the charging power source, unlike the early days, each mobile phone battery must be equipped with a special charger. The slower charging current actually protects the battery.
(4) Lithium batteries are best operated at room temperature. Using lithium batteries at high temperatures, charging lithium batteries, or storing lithium batteries for a long time will permanently reduce capacity. Charging the lithium battery at low temperature (<0°C) will cause permanent damage, but only using it at low temperature will basically only temporarily experience a decrease in capacity, and it will recover when it returns to normal temperature. There is no problem with storing lithium batteries at lower temperatures, but they cannot be stored at too low temperatures for too long.