Do laptop batteries need to be charged or discharged?

Myth 1: The laptop needs to be recharged and discharged three times to activate the battery.

You don't need to do this unless you buy a laptop that has been in stock for more than a year, because the current battery core has been activated at the time of manufacture, and the core has undergone a test equivalent to activation when it is packaged into a notebook battery. So you get the battery, has been activated, three more charge-discharge process is just unnecessary to increase the loss of the battery.

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

This is true for earlier nickel-metal hydride batteries that did not have battery-controlled circuits, but it is a joke for notebook batteries that now have smart charging and discharge control circuits. When the laptop battery is full, the charging current will be automatically cut off. Even if you continue to charge for 120 hours, there will be no change in status. In general, even the slowest charging machine, 6 hours is completely full, and the remaining "charging" is only a waste of time. Instead, when you get a new machine, you should discharge the electricity first and then charge it again.

Myth 3: Battery needs to be corrected regularly, once a month thoroughly.

For nickel-metal hydride batteries with strong memory effects, this is a must, but for lithium batteries, this cycle is too frequent. Although lithium batteries do not completely eliminate memory effects, they have greatly reduced memory effects. If you use batteries very frequently, Then you should discharge the battery to a relatively low(about 10 to 15 %) recharging, but if the discharge does not even turn on the machine(0 to 1 %), it is a deep discharge that has greater damage to the lithium battery. Usually do such an operation every 2 months. If you rarely use batteries, just do it every three months.

Myth 4: Calibration can increase battery capacity

The so-called correction is to perform a deep charge and discharge operation on the battery when the actual capacity of the battery is different from the recorded capacity in the control circuit, so that the control circuit can refresh the record and bring it closer to the actual situation of the battery. This is an operation that represents the true capacity of the battery rather than the increase in capacity. The key factor here is the actual capacity of the 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 in capacity. If the actual capacity of the battery is lower than the capacity recorded in the control circuit, the correction will make the battery appear to have reduced capacity. This is why many people argue about the correction effect. Remember that the correction is to make the true capacity of the battery appear. Eliminate the bias between the battery and the control circuit. Whether the displayed capacity will increase or decrease is determined by the state of the battery itself rather than your correction. It is very likely that the battery capacity will be greatly reduced due to the deep discharge damage during correction.

Myth 5: Compatible chargers can also be used

Laptops use much more power than mobile phones. In the most extreme case, the power supply needs to charge the battery at the same time and meet the power supply needed for the machine to run at full speed. Laptops are generally not compatible with chargers because the voltage, current, and even interface of each model are different. Compatible chargers that can be used on multiple laptops are likely to be more expensive than original chargers, even if the interface is the same. If the voltage and current are lower than the nominal value of the machine, the battery may not be able to get enough charging current when the machine works at full speed. The damage to the battery is great. If the voltage and current are too much below the nominal value, it will even find that it can not be turned on at all or can be turned on but can not be charged. Therefore, when choosing the power supply, it is best to choose the same as the original one, if it can not be found. Please note that the voltage and current must conform to the nominal value of the machine. The different product interfaces in the same factory are generally the same, but the voltage and current may be different. This must be noted!

Myth 6: The battery needs to be fully charged (or put on photoelectric) to save

Whether it is full or light, it is actually incorrect. The long-term preservation of photoelectricity will cause the core to lose its activity, and even lead to the control circuit protecting itself from being used again. The long-term preservation of full power will bring about safety hazards. The ideal method of preservation is to discharge to about 40 % and then preserve. Lithium batteries are afraid of humidity and high temperature, so they should be kept in a cool and dry place, but the temperature must not be too low, otherwise the capacity will be greatly reduced, about 20 degrees Celsius is the ideal preservation temperature.

Myth 7: Battery down, you can change the core yourself

Many people's batteries are so deadly that manufacturers seem to have expected someone to do this. Many brand notebook batteries are designed to have self-locking features. Once the core is out of the control circuit, the circuit will enter the self-locking state. Only the use of specific means can unlock, before the control circuit will not work, that is, the battery is equivalent to scrap, the laptop battery core is not a dry battery that can be freely replaced, if you must change the core, Remember to find a dedicated battery repair company to handle the knife, their own replacement of small things, the kind of effort after the failure of depression and depression is the worst.

Myth 8: 99 % after the charge is less than 100 %, continue to charge will explode

The chance of a notebook battery explosion is almost non-existent. At most, it emits high heat and causes the shell to melt. However, it rarely causes open fire. The few accidents announced are actually due to poor processes during production and lead to short circuits during use. Even if most of these short circuits are still disconnected by the protective circuit in the battery, the circuit will not be damaged more unless the core short circuit is before the protective circuit(this is how the previous COMPAQ laptop battery explosion time should be caused). I 've only seen two cases of this in the more than three years I 've had a lot of access to notebooks. Instead, there are many such things in mobile phones. In the final analysis, it is the quality of batteries. Mobile phones have a large number of low-quality assembled batteries, and notebook computers have hardly ever sold such batteries because none of the models are large enough to produce compatible batteries.

The reason why the charge is less than 100 % after 99 % is often due to the deviation between the record of the battery control circuit and the status of the battery itself. The battery has not reached the voltage recorded in the control circuit, so the control circuit has been charged, and the battery is actually full. This problem can usually be solved by correction, but even if it is not corrected, it does not matter, because most charging circuits will automatically disconnect after a long period of time can not be filled, and even smart automatic records are currently 99 % refreshed to 100 %. Even if it is a silly design that has been going on and on, it will not cause harm because the current at this time is very small.

The current notebook computer battery basically has a temperature detection circuit. When the battery temperature is too high, the control circuit will mostly forcibly disconnect the battery to prevent the temperature from rising further. So the chance of an explosion in a laptop battery is no less than winning the lottery jackpot.

The page contains the contents of the machine translation.