Description :
A dual charger for 18650 3.7V rechargeable Li-ion batteries is a device designed to charge two 18650 Li-ion batteries simultaneously. This type of battery charger typically features two battery slots or bays, each with its own charging circuit and status indicator.
The charger is typically powered by a standard AC wall adapter or USB port, making it easy to charge batteries from a variety of power sources. The charging process is typically controlled by a microchip that monitors the battery voltage and current to prevent overcharging, over-discharging, or overheating.
Some dual chargers may also offer additional features, such as the ability to charge other types of batteries or a built-in display that shows the charging status of each battery. Dual chargers are popular among users of 18650 Li-ion batteries because they allow for efficient charging of multiple batteries at once, which can save time and reduce the need for multiple chargers.
Specification :
Input voltage: Most dual chargers will have an input voltage range of 100-240V AC or 5V DC, allowing them to be powered by a variety of sources, such as a wall adapter or USB port.
Output voltage: The output voltage for each battery slot is usually 4.2V, which is the maximum voltage that a fully charged 18650 Li-ion battery can reach.
Charging current: The charging current for each battery slot may vary, but it's usually between 500mA and 1A. Higher charging currents can reduce the charging time, but may also generate more heat and reduce the overall lifespan of the battery.
Charging time: The charging time for 18650 Li-ion batteries can range from 2 to 6 hours, depending on the charging current and the capacity of the battery.
Safety features: Most dual chargers will include safety features such as overcharge protection, short circuit protection, reverse polarity protection, and overheat protection.
LED indicators: Dual chargers typically have LED indicators that show the charging status of each battery. These may include red and green lights, or a digital display that shows the charging progress.
Compatibility: The dual charger should be compatible with 18650 3.7V rechargeable Li-ion batteries, and may also support other types of batteries with similar specifications.