Is it still 12 hours to charge the phone with lithium battery for the first 3 times?

About the first charge of the mobile phone battery Correction of the misconception about "new battery activation, charging for 12-14 hours" has been seen in many places on the forum and seems to have become a classic. But if the truth leaves the specific conditions, it becomes a fallacy -14 hours of origin: the first generation of nickel-cadmium batteries, is required to charge at a small rate, generally recommended charging current 1 10C, for example, your battery capacity is 600mAh, then 1C is 600mA, 1 10C is 60mA.

Therefore, it takes more than 10 hours to fully charge, and for nickel-cadmium batteries, small rate charging is beneficial. 2. The current battery situation of mobile phones: mainstream mobile phones are basically lithium-ion batteries, and the closest to our impression should be 3210, equipped with nickel-metal hydride batteries, and it seems that we can't find mobile phones with nickel-metal hydride batteries around us.

3. Knowledge of lithium-ion batteries: We only talk about capacity on the one hand. There are two ways to measure the capacity of a lithium-ion battery:

1C charge and discharge; Charging and discharging, no matter what charging system is used, should meet the standard. Because lithium-ion batteries are different from previous nickel-cadmium batteries, the high-rate charging of 1C is already acceptable, and it must be accepted. And if a 600mAh battery is charged at 1C, it should be fully charged in about 1 hour, and if the phone is directly charged this way (many are, 12-14 hours is nonsense.

According to the GB T18287 2000 national standard, when the constant current is charged, the constant voltage is changed, and the current drops to C, the charging is considered to be terminated. For example, the charging current of the charger is that if you charge a 600mAh battery, the charging current will drop to 6mAh in about 2 hours, and it is considered to be fully charged. Why did it come down?

Because it is already full, this is a reflection of the cell. For nickel-metal hydride electricity, the national standard has also stipulated the index of high-rate charge and discharge. 4. What counts as "activation"?

The lithium-ion battery itself is "live", if the design capacity is 600mah, although I charge it for 2 hours, I will be full, and then discharge, I can get a capacity of 600mah, and the design capacity has reached it, what is the problem of whether it is alive or not? The technical supervision department implements the national standard, and the detection capacity is charged with 1C, and then put, and the capacity reaches the qualification once out of 5 times. So use it normally, charge it normally, and use it like this from the new battery, without worrying about "not being excited".

5. Charging for 14 hours is to deceive yourself: direct charging with a mobile phone, about 2 hours is full, and the remaining time is the time of the "baking" machine, if there is an error in the charging control of the mobile phone (there are some), then it is the time to test the battery. NiMH battery simple knowledge NiMH battery specification name:

Nickel metal hydride battery nominal voltage (approximate value that represents the cell voltage):. Taking 3508 hydrogen electricity as an example, n=3) termination voltage (when the discharge termination is specified): . Charging system:

Constant current, which starts constant current charging after discharging to the termination voltage4C Charging: to Charge 2, Fully Charged:

It didn't seem to have a big impact, but my family accidentally unplugged it when it was supposed to charge my new phone, and it didn't change much.

Today's mobile phone batteries are basically activated when they come out.

Lithium batteries do not need to be charged for more than 12 hours, that is the charging method of early batteries, lithium batteries only need to be fully charged.

After the lithium battery Yusui code is placed for a period of time, it enters a dormant state, and the capacity is lower than the normal value at this time, and the use time is also shortened. However, lithium batteries are easy to activate, as long as they go through 3-5 normal charge-discharge cycles, the battery can be activated and the normal capacity can be restored. Due to the characteristics of the lithium battery itself, it is determined that it has almost no memory effect.

Therefore, the new lithium battery in the user's mobile phone does not need special methods and equipment during the activation process, just fully charge, do not overcharge.