1. Depth of discharge and rechargeable times

The number of rechargeable times is related to the depth of discharge. The deeper the depth of discharge of the battery, the fewer times the battery can be recharged. The number of rechargeable times * depth of discharge = the number of completed charging cycles, the higher the number of completed charging cycles, the higher the battery life, you can charge times * depth of discharge = actual battery life (ignoring other factors)

2. Overcharge, overdischarge, and large charge and discharge current

Avoid overcharging the battery. Any form of overcharging of lithium-ion batteries will cause serious damage to battery performance and even explosion. Avoid deep discharges below 2V or 2.5V, as this will quickly and permanently damage the lithium-ion battery. Internal metal plating may occur, which can cause a short circuit, making the battery unusable or unsafe.

Most lithium-ion batteries have an electronic circuit inside the battery pack. If the battery voltage is lower than 2.5V, exceeds 4.3V during charging or discharging, or if the battery current exceeds a predetermined threshold, the electronic circuit will disconnect the battery. Avoid large charging and discharging currents, because large currents put excessive pressure on the battery.

3. Too hot or cold environment

Temperature also has a greater impact on the life of lithium batteries. The environment below freezing point may cause the lithium 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 discharged from the notebook for a long time and will soon be scrapped.

4. Long time full and no power state

Experiments show that for some laptop lithium batteries, the battery voltage often exceeds the standard voltage by 0.1 volts, that is, from 4.1 volts to 4.2 volts, then the battery life will be halved, and if it is increased by another 0.1 volts, the life will be reduced to the original 1 /3; The more fully charged the battery, the greater the loss of the battery.

The long-term low or no power state will make the resistance of the electron movement inside the battery larger and larger, thus causing the battery capacity to become smaller. Lithium batteries are best in an intermediate state of power, in which case the battery life is the longest.