At present, most of electronic products use lithium-ion batteries, and a few years ago, electronic products mostly used nickel-cadmium batteries. These two batteries have different memory effects. The so-called memory effect means that during the first few charges, if it stops before being fully charged, the battery will remember the previously charged capacity when charging in the future.
Lithium-ion batteries have no memory effect. The first charge does not need to be fully charged for 10-12 hours. The first few full-charge methods are only used to manage the battery capacity of electrical equipment. It can also be charged and discharged during future use without affecting capacity.
For the previous lead-zinc, cadmium-nickel (memory effect) batteries, it takes 6 to 12 hours to charge for the first time, and it needs to be fully charged before it is discharged. As for the batteries currently used, such as nickel-metal hydride batteries and lithium-ion batteries (with extremely low memory effect), especially lithium-ion batteries, do not discharge the battery before charging, and it can be used without being fully charged. And the battery has an electronic protection circuit, it will automatically disconnect when the battery is fully charged, usually 2 or 3 hours.
Lithium-ion batteries have no memory effect and can be recharged at any time. In order to reduce the number of recharges, deliberately recharging the battery with photoelectricity will not extend the battery life, but will have a negative impact on battery life. In addition, If the phone runs out of power and turns off automatically, the internal voltage of the lithium-ion battery will be too low due to excessive discharge, and it may not be able to start and charge. Therefore, lithium-ion battery charging pays attention to "eat less and eat frequent", frequent shallow charge and discharge will help to extend its life.
Lithium-ion battery first charging precautions
1. It is recommended that you avoid waiting until the battery level is below 20% before charging the battery. Excessive discharge will cause the battery to wear out faster. It can be recharged anytime to extend the life of the battery.
2. Many users often keep their mobile phones on while charging. In fact, this will easily damage the life of the mobile phone, because the circuit board of the mobile phone will heat up during the charging process. At this time, if there is an incoming call, an instant reflux may occur Electric current can cause damage to parts inside the phone.
3. Don't leave the phone idle for a long time, and charge the battery from time to time. If the phone is not used for a long time and is not charged, the battery power will be completely consumed, which will cause abnormal charging or fail to charge.
4. The life of the lithium-ion battery is determined by the number of repeated charge and discharge times, so it should be avoided to charge the battery when there is a lot of remaining power. Such a charging situation will shorten the battery life. When the mobile phone is turned off, it cannot exceed 7 days.
5. Lithium-ion batteries or chargers will automatically stop charging after the battery is fully charged. There is no so-called “trickle” charging that lasts for 10 hours. In other words, if your lithium-ion battery is fully charged, it will not be charged on the charger.
6. After the battery is fully charged, the phone will stop charging internally, but the phone will continue to charge after the standby power drops. It is recommended that you remove the charger in time to avoid long-term charging, otherwise it may damage the battery and shorten the life of the charger.
The above are the precautions about whether the lithium ion battery needs to be fully charged and charged at first time. Different battery products require different methods of charging, and must be used according to the product instructions.