After running out of power, why can't the 18650 battery be recharged?

Firstly, China's power exhaustion cannot be recharged is actually a case of over-discharge of battery management.

The 18650 battery was a lithium-ion battery. 18650 manufacture The ordinary battery is 18650 with a rated voltage of 3.7V. It has a storage range of about 2.5V to 4.2V, meaning that when the battery is fully charged, it will be 4.2V, while when it is discharged, it will be without a power source of approximately 2.5V.

In the overall design of the lithium battery charger, a safety measure is implemented when inserting the battery into the charging tank. This involves checking for voltage differences to determine if a lithium battery is present. Generally, if the battery's voltage is below 2.0V, it will not be recognized as a lithium battery and therefore not charged. This simple precaution prevents potential safety hazards that may arise from user error, such as using a non-compatible battery like dry or nickel-hydrogen-cadmium batteries.

Early or simple chargers will include all of these features. These features are simple and practical. When the voltage is zero volts, or after a lithium-ion battery has been discharged below 2.0 volts in the air for a long time, the charger cannot charge the battery through the protection panel.

In fact, the situation of 18650 power exhaustion not charging (overdischarge) can actually be solved. The protected battery can be activated manually by finding a battery with a voltage, positive to positive, negative to negative. However, this method only works with protected batteries. In the event that an overdischarged battery is used, the shock current may directly damage the battery.

The public can now manage their own lithium battery charging with the XTAR Axstar, one of the latest 18650 chargers on the market. This charger has been integrated into our student program, along with a business recognition and processing system. If the voltage capacity of the battery being charged is below 2.0V, the charger will activate a small current to safely restore and optimize its technology. This intelligent design prevents any risk of damage or accidents for dry or nickel-hydrogen-cadmium batteries. Unlike Chinese batteries, which have a limited voltage range, lithium batteries can rapidly increase in voltage from 2.5V to 4.2V when charged with a low current. Our charger quickly detects this difference and adjusts its charging method accordingly; halting charging for non-compatible batteries and continuing for lithium ones until they reach optimal performance before switching to constant current charging. The result: your 18650 battery is fully revived without any overcharging issues.