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How to extend the capacity and life of lithium-ion batteries?

According to Tom Hartley, a professor of electrical engineering at the University of Akron, the more the battery is fully charged, the greater the loss of the battery. Lithium-ion batteries work best in a medium charge state, in which case the battery life is the longest.

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Tom Hartley said that both too high and too low power states will adversely affect the life of lithium-ion batteries. The number of rechargeable cycles marked on most appliances or batteries sold is detected based on 80% discharge. The test statement pointed out that for some laptop lithium-ion batteries, the battery voltage tends to exceed the standard voltage by 0.1 volts, that is, from 4.1 volts to 4.2 volts, then the battery life will be halved. If you increase by 0.1 volts, the life will be reduced to the original 1 /3; Long-term low or no electricity will cause the battery's internal resistance to electronic movement to become larger and larger, resulting in a smaller battery capacity. NASA set the battery power consumption of its Hubble Space Telescope to 10% of the total capacity to ensure that the battery can be repeatedly charged and discharged 100,000 times without needing to be updated.

Secondly, temperature also has a greater impact on the life of lithium-ion batteries. The environment below freezing point may cause the lithium-ion battery to burn out when the electronic product is turned on, and the overheated environment will reduce the battery capacity. Therefore, if the notebook is used for a long time without removing the battery from an external power source, the battery will be exposed to the high heat emitted by the notebook for a long time and will soon be scrapped.

It can be concluded that the following points can be used to extend the capacity and life of lithium-ion batteries.

1. If you use an external power supply to power the laptop for a long time, or the battery power has exceeded 80%, remove the battery immediately. It is not necessary to overflow the battery during normal charging, just charge it to about 80%. Adjust the power options of the operating system, adjust the battery level alarm to more than 20%, and the minimum battery level should not be less than 20%.

2. Disconnect the power cord (including the USB port with charging function) immediately after charging small electronic devices such as mobile phones. Leaving the connection will damage the battery. Charge frequently, but don't overcharge.

3. Do not let the battery run out of power, whether it is a notebook or a mobile phone, etc.



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