Why don’t sellers just ship their laptop batteries fully charged?
Each laptop battery has a limited lifespan . Laptops are generally allowed to be fully discharged 1,000 times . If fully charged and discharged once a day , a new original battery can be used for about three years . After the laptop is fully charged 1,000 times , the maximum battery power is maintained at 80 % .
The number of times a battery is charged and discharged is directly related to its lifespan. Each time it is charged and discharged, a small part of the battery’s lifespan is consumed .
The transport mode, commonly known as locked, is to avoid rapid consumption of battery power and damage to the battery due to deep over-discharge caused by long-term storage in the warehouse.
Lithium-ion batteries do not need to be activated by deep charging and discharging at the beginning of use, because the battery initialization and testing process has been completed when the battery is manufactured. In order to avoid the impact of natural loss on battery saving efficiency, manufacturers will not charge the battery to 100%. During transportation and sales, the battery will have some natural loss, so the battery of a newly purchased laptop is not fully charged.
Lithium-ion batteries also do not have the so-called “memory effect” and can be charged at any time. Battery memory effect refers to the reversible failure of the battery, that is, the performance of the battery that can be restored after failure. After the battery has been subjected to a specific working cycle for a long time, it automatically maintains this specific tendency. This means that the battery seems to remember the user’s daily charging and discharging amplitude and mode, and it is difficult to change this mode over time, and it can no longer be charged or discharged in large quantities.
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Scientific discharge of lithium batteries
No matter what you do, your battery won’t last forever. However, there are some simple ways you can follow to properly care for your battery. This will ensure that your laptop battery stays healthy for years to come .
1. The discharge current should not be too large
Excessive current will cause the internal heat of lithium batteries, which may cause permanent damage. The larger the discharge current of lithium batteries, the smaller the discharge capacity and the faster the voltage drops.
2. Never over-discharge
The discharge of lithium batteries should not exceed 80% of the battery capacity to better protect the battery. The storage of electrical energy in lithium batteries is achieved through a reversible chemical change in electrochemistry. Excessive discharge will cause this chemical change to have an irreversible reaction. Therefore, lithium batteries are most afraid of over-discharge. Once the discharge voltage is lower than 2.7V, the battery may be scrapped. Mobile phone lithium batteries are equipped with protection circuits. If the voltage is not low enough to damage the battery, the protection circuit will work and stop discharging.
3. Do not discharge at high power
When a lithium battery is discharged, Li+ is deintercalated from the negative electrode and then embedded into the positive electrode through the electrolyte. The positive electrode is in a lithium-rich state, that is, the battery will discharge when used normally, and vice versa when charged. The voltage decay of a lithium battery decreases faster as the discharge rate increases, and the termination voltage is reached earlier, but the rate of decrease at the end becomes slower; therefore, the characteristics of low-rate discharge are better than high-rate discharge, and high-power discharge should be avoided as much as possible.
Several misunderstandings about laptop battery maintenance:
1. When using the battery for the first time, does it take a long time to charge?
Laptops have a complete power management mechanism. When the battery is fully charged, the computer will automatically stop charging. So just charge it fully and it does not need to be charged for a long time.
2.Does the battery need to be recharged after use?
Old laptops usually use nickel-cadmium and nickel-metal hydride batteries. These batteries are prone to memory effect and need to be discharged to low power before charging to avoid the memory effect affecting battery life. Today’s laptop batteries are all lithium batteries, which have no memory effect and do not need to be discharged before charging.
3.When plugging in the power adapter, do I need to remove the battery to prevent repeated charging and discharging?
Laptops have a complete power management system. The power management driver and software can effectively control the battery charge and discharge, and the battery will not be repeatedly charged. Therefore, when using the power adapter, there is no need to remove the battery, and connecting the battery can prevent unexpected situations such as power outages.
4.Does the battery need to be fully charged for long-term storage?
Before storing the battery separately, the power only needs to be kept at about 50%. It is also recommended to store the battery in a dry environment with a temperature range of -10℃to 35℃and avoid sunlight. The storage time should not exceed three months. Take it out regularly for a complete charge and discharge , and then store it with about 50% of the power remaining.
Finally, if you want to learn more about batteries, please visit:BatteryMall.com/blogs/support