2S 4A 8.4V Lithium Battery Power Charging Module – Type C

The 2S 4A 8.4V Lithium Battery Power Charging Module – Type-C connects two 3.7V Li-Ion cells in series, providing a nominal 7.4V battery pack and a full-charge voltage of 8.4V, with 4.2V per cell at full charge. The 2S lithium battery charger accepts DC 3V to 6V input through the Type-C connector and provides a charging current of up to 4A, depending on the input supply and module configuration. The module automatically regulates the charging process and terminates charging when the battery pack reaches the specified 8.4V limit, helping prevent overcharging. Proper charging protection is essential because repeatedly exceeding the recommended voltage can permanently reduce Li-Ion battery capacity.

The 2S charging module Type C accepts up to 4A from the input source — standard USB-C PD chargers and power banks at 5V 3A or above supply that current comfortably. Compatible cells include 18650 and 14500 format Li-Ion batteries, the two most commonly used cylindrical lithium sizes in DIY power builds. Recommended input sits between 3.7V and 5V for stable regulation. Applying the full 6V maximum input works within specification but generates more heat inside the module than a 5V source does — for continuous use, a 5V USB-C supply is the better choice.

Lithium Battery Power Charging Module covers cold-environment robotics and under-bonnet automotive builds without thermal shutdown concern. The 18650 charger module suits engineers building custom 2S battery packs for drones, handheld instruments, and portable electronics. This power charging module working on lithium battery management and builds compact portable power systems.

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Features:

• Type-C input accepts 5V USB-C power banks and standard wall adapters
• 8.4V auto termination stops charging at full 2S Li-Ion pack voltage
• 2.2A charging current balances charge speed with cell heat generation
• 18650 and 14500 cell compatibility covers most cylindrical Li-Ion formats

Technical Specifications:

Specification	Details
Battery cell type	2S
USB Interface	USB Type-C
Output Voltage	8.4V
Output Current	4A
Overcharge Protection	Yes
Charging Current	4A
Compatibility	8.4V 4A 18650 Lithium battery

 Applications:

• Charges custom 2S 18650 battery packs for portable electronics projects.
• 2S lithium battery packs conveniently through a standard USB-C power source.
• Maintains 2S lithium battery in off-grid solar-powered sensor applications.
• Recharges 2S 4A 18650 battery packs integrated inside portable speaker enclosures.

Package includes:

• 1 x 2S 4A 8.4V Lithium Battery Power Charging Module – Type C