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  • Universal plug 3.7V lithium battery charger 4.2V 3A switching power supply
Universal plug 3.7V lithium battery charger 4.2V 3A switching power supply

Universal plug 3.7V lithium battery charger 4.2V 3A switching power supply

3.7v lithium battery charger

Product Description:

Henryuan's universal plug 3.7V Lithium Battery Charger is a first class solution for charging 18650 3.7V lithium-ion batteries. This charger got the multiple safety certifications including UL, cUL, ETL, FCC, CE, GS, UKCA, SAA, PSE, and CCC, making it suitable for use with AU, EU, UK, US, JP, and CN wall plugs. It features an advanced charging scheme design with multiple protection mechanisms and high-quality components, ensuring faster and safer charging.
Key Specifications and Features:

Safety Certificates
  • Comprehensive safety certifications: UL, ETL, cUL, FCC, PSE, CE EMC, LVD, UKCA, SAA, KC, CCC
Input Specifications
  • Input Voltage Range: 90Vac-264Vac
  • Rated Input Voltage: 100Vac-240Vac
  • Input Frequency: 47Hz-63Hz
  • Input Current: 0.6A
  • Inrush Current: 35A
Output Specifications
  • Output Voltage and Current: 4.2V 3A
  • Charging Stages:
    • Constant Current Mode: 2.5V-4.2V(battery voltage), Current: 3A (Red LED)
    • Constant Voltage Mode: 4.2V, Current: 3A -> 0.3A (Red LED)
    • Trickle Charging Mode: 4.2V, Current: 0.3A -> 0 (Green LED)

  • LED Indicator: Dual-color indicator displays charging status—red during charging and green when fully charged


Charging Stage

LED Indicator





Constant Current




Constant Voltage




Trickle Current

LED turn red to green when charging current below 0.3A


This versatile charger is ideal for a wide range of applications, including:
  • Educational robot chargers
  • Electric toy chargers
  • LED desk lamp chargers
  • Flashlight chargers
  • Diving lamp chargers
  • GPS module chargers

Charging Cureve Special Designed For Charging 3.7V Lithium Ion Battery

3.7v lithium battery charger

Protection Features
  • Over current protection
  • Over voltage protection
  • Short circuit protection
  • Reverse polarity protection

Quality Assurance

  • Experienced Sales Engineers: Over a decade of experience understanding customer needs
  • Rigorous Material Selection: High standards for raw material suppliers
  • Stringent Inspection Process: Strict incoming material inspection
  • Advanced Design and Testing: Over 20 years of engineering experience and advanced production testing equipment
  • Comprehensive Aging Testing: 100% aging testing process, up to 4 hours of full load aging
  • Efficient After-Sales Support: Analysis, feedback, and resolution system within 48 hours

About Henryuan Group Henryuan Group, with over 13 years of experience in the production and R&D of lithium battery chargers, is a leading industry supplier. Our high-quality 4.2V 3A Li-ion battery chargers are recognized for their superior performance and safety features, making them a popular choice among consumers globally. Our products are exported to the Americas, Europe, the United Kingdom, Australia, New Zealand, Italy, France, Germany, Japan, South Korea, Hong Kong, Taiwan, and other regions, enjoying a high market share. Our 4.2V 3A Lithium ichargers are known for their fast and safe charging, making them perfect for various applications. With good EMI performance and experienced engineers, we can meet customer requirements for both existing and developmental products. In summary, our 3.7V lithium battery chargers are reliable and efficient solutions for all your charging needs. We offer various models, including 4.2V 0.5A, 1A, 1.5A, 2A, 2.5A, 3A, 3.5A, 4A, 5A, 6A, and 7A. For a safe, reliable, and efficient lithium battery charger, contact Henryuan's sales engineers today for the reliable 4.2V lithium ion battery chargers.

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