Should the laptop battery be charged or discharged?

Myth 1: To buy a laptop, you need to charge and discharge it repeatedly for three times to activate the battery.

Unless the laptop you bought is a product that has been in stock for more than one year, you don't need to do this, because the battery cell has been activated when it leaves the factory, and the cell has passed the test equivalent to activation when it is packaged into a notebook battery, so the battery you got has been activated, and it is meaningless to charge and discharge it three times to increase the battery loss.

Myth 2: The first charge must be enough 12 hours.

This is suitable for the early Ni-MH battery model without battery control circuit, but it is a joke for the notebook battery with intelligent charge and discharge control circuit now. When the notebook battery is fully charged, the charging current will be automatically cut off. Even if you continue to charge 120 hours, the state will not change. Generally speaking, even the slowest charging machine will be full for 6 hours, and the rest of the "charging" is just a waste of your time. Instead, when you get a new machine, you discharge it first and then charge it.

Myth 3: The battery needs to be calibrated regularly and charged and discharged completely once a month.

This is a necessary work for Ni-MH battery with strong memory effect, but for lithium battery, this cycle is too frequent. Although the lithium battery did not completely eliminate the memory effect, it greatly weakened the memory effect. If the battery is used frequently, it should be discharged to a relatively low level (about 10~ 15%) for recharging, but if it is discharged to the point where even the machine cannot be turned on (0 ~ 0). If you seldom use batteries, just do it once every three months.

Myth 4: Correction can improve battery capacity.

The so-called correction is to charge and discharge the battery deeply when the actual capacity of the battery is different from the capacity recorded in the control circuit, so that the control circuit can refresh the record and make it close to the actual situation of the battery. This is an operation to display the actual capacity of the battery, not to increase the capacity. The key factor here is the actual capacity of battery. If the actual capacity of the battery is higher than the capacity recorded in the control circuit, the correction can make the battery appear to increase its capacity. If the actual capacity of the battery is lower than the capacity recorded in the control circuit, then the battery appears to be reduced due to correction, which is why many people argue about the correction effect. Remember, the calibration is to show the true capacity of the battery and eliminate the deviation between the battery and the control circuit. Whether the displayed capacity is increased or decreased depends on the state of the battery itself, not your calibration. It is very likely that the battery capacity will be greatly reduced due to deep discharge damage during calibration.

Myth 5: Compatible chargers can also be used.

The power consumption of notebook computers is much higher than that of mobile phones. In the most extreme case, the power supply needs to charge the battery at the same time to meet the power supply required for the machine to run at full speed. Generally, there is no compatible charger for notebook computers, because the voltage, current and even interface of each model are different. A "compatible charger" that can be used in various notebooks is likely to be more expensive than the original charger. Even if the interfaces are the same, if the voltage and current are lower than the nominal value of the machine, the battery may not get enough charging current when the machine works at full speed. If the voltage and current are much lower than the nominal values, you may even find that you can't start the machine at all, or you can start it but you can't charge it. Therefore, when choosing the power supply, it is best to choose the same as the original factory. If it is not found, please note that the voltage and current must conform to the nominal values of the machine. The interfaces of different products in the same factory are generally the same, but the voltage and current may be different. Please pay attention to this!

Myth 6: The battery needs to be fully charged (or discharged) to be stored.

Whether it is fully charged or discharged, it is actually incorrect. Long-term storage of discharge lamps will make battery cells lose their activity, and even lead to self-locking of control circuits, which will bring potential safety hazards. The ideal storage method is to discharge to about 40% before storage. Lithium batteries are afraid of humidity and high temperature, so they should be stored in a cool and dry place, but the temperature should not be too low, otherwise the capacity will be greatly reduced. About 20 degrees Celsius is the ideal storage temperature.

Myth 7: If the battery fails, you can change it yourself.

Many people's batteries are so deadly. Manufacturers seem to have expected someone to do this. Many brands of notebook batteries are designed with self-locking function. Once the battery core is separated from the control circuit, the circuit will enter the self-locking state, which can only be unlocked by special means. Before this, the control circuit will not work, that is, the battery is equivalent to being scrapped. The battery core of notebook battery is not a dry battery that can be replaced at will. If you must change the battery, please remember to find a special battery maintenance company to operate and replace it yourself.

Myth # 8: After 99%, 100% cannot be charged, and it will explode if it continues to be charged.

There is almost no possibility that the laptop battery will explode. At most, it will emit high heat, which will cause the shell to melt, but it will rarely cause an open flame. In fact, a few reported accidents are caused by poor technology in production and short circuit in use. Even if most of this short circuit is broken by the protection circuit in the battery, it will not be more damaged unless the battery is short-circuited before the protection circuit (which should be caused by the explosion time of Compaq laptop battery). This kind of thing has caused me a lot of contact with notebooks. On the contrary, there are many such things in the mobile phone. In the final analysis, it is still the quality of the battery. There are a lot of inferior assembled batteries in mobile phones, and notebook computers almost never sell such batteries, because no model has enough electricity to produce compatible batteries.

The reason why the charge after 99% is less than 100% is often because the record of the battery control circuit is different from the state of the battery itself, and the battery has never reached the voltage recorded by the control circuit, so the control circuit has been charging, but the battery is actually full. This problem can usually be solved by correction, but it doesn't matter even if it is not corrected, because most charging circuits will automatically disconnect after a long time. Even if the current refresh rate of intelligent automatic recording is 100%, even if it is a fool-like design that keeps going, it will not cause harm because of the minimal current at this time.

At present, there are basically temperature detection circuits in laptop batteries. When the battery temperature is too high, most control circuits will forcibly disconnect the battery to prevent the temperature from rising further, so the probability of battery charging explosion of notebook computers is no less than winning the lottery. & lt/FONT & gt；