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Rechargeable 3.7V lithium ion battery charger dc 4.2V

Product No.：HRY0422000
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battery charger for 3.7v li ion battery

Henryuan 3.7V Lithium-Ion Battery Charger

Henryuan introduces the 4.2V 2A rechargeable lithium-ion battery charger, specifically tailored for 18650 3.7V lithium-ion batteries. Built with advanced technology, this charger ensures efficient, safe, and fast charging, meeting the diverse needs of global users across various industries.

Key Features:

1. Industry-Leading Safety Certifications

Our chargers are rigorously tested and certified to meet global safety standards, including:

UL, ETL, cUL, FCC, PSE, CE EMC, LVD, UKCA, SAA, KC, CCC

2. Comprehensive Input Specifications

Voltage Range: 90Vac-264Vac
Rated Voltage: 100Vac-240Vac
Frequency: 50/60Hz
Current: 0.6A
Inrush Current: 35A

3. High-Precision Output Specifications

Output Voltage: 4.2V
Current: 2A
Charging Status Indicator: Dual-color LED (Red during charging, Green when fully charged)

4. Charging Process:

Output Voltage: 4.2V
Output Current: 2A
Dual-Color LED Indicator:
- Red: Charging
- Green: Fully charging battery

Output		Charging Stage	LED Indicator
Output
Current	Voltage
2A	2.5V-4.2V	Constant Current	RED
2A->0.2A	4.2V	Constant Voltage	RED
0.2A->0	4.2V	Trickle Current	GREEN LED turn red to green when fully charge battery

5. Smart LED Indicators & Charging Curve

Clear, intuitive LED signals guide the charging process, detailed charging curve ensures batteries charge safely and efficiently.

Constant Current: 2A fast charging, Red LED.
Constant Voltage: Maintains 4.2V as current decreases from 2A to 0.2A, Red LED.
Trickle Charging: Final stage below 0.2A, LED turns Green.

4.2v 18650 battery charger

6. Unmatched Protection Features

Overcurrent, Overvoltage, Short Circuit, and Reverse Polarity Protection

7. Quality Assurance You Can Trust

Expertise: Over 20 years of design and production experience.
Rigorous Selection: Stringent raw material inspection ensures top-tier quality.
Reliability Testing: 100% aging testing for up to 4 hours guarantees durability.
Customer Support: Comprehensive after-sales service with resolutions in under 48 hours

8. Applications

Ideal for powering a variety of devices, including:

Educational Robots
Electric Toys
LED Desk Lamps
Flashlights & Diving Lamps
GPS Modules

Global Reach & Trusted Reputation

With over a decade of expertise, Henryuan is recognized worldwide for producing professional-grade battery chargers that meet the highest industry standards. Our products are trusted across the Americas, Europe, Asia, and Oceania, the worldwide markets, ensuring your devices are powered reliably wherever you are.