(1) How to charge the new battery
It should be noted that when using a lithium battery, the battery enters the sleep state after being left for a period of time, and the capacity is lower than the normal value, and the use time is also shortened accordingly. However, the lithium battery is easy to activate, as long as after 3-5 normal charge and discharge cycles, the battery can be activated to restore the normal capacity. Due to the characteristics of the lithium battery itself, it has almost no memory effect. Therefore, the new lithium battery in the user's mobile phone does not require special methods and equipment during the activation process.
Regarding the "activation" problem of lithium batteries, many claims are: the charging time must be more than 12 hours, repeated three times in order to activate the battery. This "the first three charges need to charge more than 12 hours" is obviously a continuation of nickel batteries (such as nickel cadmium and nickel metal hydride). So this argument can be said to have been misinformed from the beginning. There is a very big difference between the charge and discharge characteristics of lithium batteries and nickel batteries, and it can be very clearly told that all serious formal technical information I have reviewed emphasizes that overcharge and overdischarge will affect lithium batteries, especially liquid lithium. Ion batteries cause huge damage. Therefore, it is best to charge according to the standard time and standard method, especially not to charge for more than 12 hours (the charger shows full).
In addition, the lithium battery or charger will automatically stop charging after the battery is fully charged. There is no so-called "trickle" charging that lasts for more than 10 hours. In other words, if your lithium battery is fully charged, it is also white charged on the charger. And no one of us can guarantee that the characteristics of the battery's charge and discharge protection circuit will never change and the quality is foolproof, so your battery will be on the verge of danger for a long time. This is another reason why we are against long charging.
In addition, another aspect that cannot be ignored is that lithium batteries are also not suitable for overdischarge, and overdischarge is also very disadvantageous for lithium batteries.
(2) When should charging start in normal use
You can often see this statement, because the number of charge and discharge is limited, so you should recharge the phone battery as much as possible, in fact, the life of the lithium battery has nothing to do with this. The following is an example of an experimental table on the charge-discharge cycle of a lithium-ion battery. The data on the cycle life is listed as follows:
Cycle life (10% DOD): >1000 times
Cycle life (100% DOD): >200 times
DOD is the abbreviation of depth of discharge. It can be seen from the table that the number of chargeable times is related to the depth of discharge. The cycle life at 10% DOD is much longer than that at 100% DOD. Of course, if it is equivalent to the relative total capacity of the actual charge: 10%*1000=100, 100%*200=200, the latter’s full charge and discharge is still better, but the previous netizen’s statement needs to be corrected: in normal Under the circumstances, you should reserve the battery according to the principle of recharging the remaining power of the battery, but if your battery is not expected to persist throughout the day on the second day, you should start charging in time, of course, if you are willing to back It's another matter to take the charger to the office.
The principle of recharging the remaining battery power is not to extremes. As long as the long charge is widely circulated, it is "try to run out of battery power." This method is actually only used on nickel batteries, the purpose is to avoid the memory effect, unfortunately it is also circulating on lithium batteries. There was an example of someone who used the automatic shutdown after the warning that the battery of the mobile phone was too low. As a result, the mobile phone in this example did not respond during subsequent charging and booting, and had to be sent to customer service for repair. This is actually caused by the battery being over-discharged and the voltage is so low that it does not have the normal charging and starting conditions.
Personally recommend that the mobile phone's lithium ion battery should not be fully charged or used without electricity. The battery will be charged before it is used up, which will not cause damage to the battery. The charging should be within 2-3 hours, not necessarily full. However, the lithium battery should be fully charged (normal charging time) and discharged one to two times every 3 to 4 months.
Lithium batteries that have not been used for a long time should be stored in a cool and dry place, in a semi-electric state (70-80% of full charge, if your phone shows 4 cells when fully charged, then 3 cells is best), It is dangerous to store at full power and the battery will be damaged, and the battery will be destroyed if it is stored without power. Every 3 to 6 months, check if you need to add electricity.
Lithium-ion batteries can be divided into liquid lithium-ion batteries and polymer lithium-ion batteries according to the electrolyte. The electrolyte of polymer lithium-ion batteries is colloidal and will not flow, so there is no leakage problem and it is safer.