OEM Available
4.2V 1A Li-Ion 1-Cell Battery Charger
Model Number:
4.2W
Power
4.2V
Voltage
1.0A
Current
Warranty:
Product Overview
Why Choose This Product
4.2W 4.2V Li-Ion Battery Charger — Precision CC/CV Charging The YHY-BC0101A is a 4.2W Li-Ion battery charger delivering 4.2V at 1.0A. Features constant current/constant voltage charging profile, universal AC input (100-240VAC 50/60Hz), DoE Level VI efficiency.
Key Features
Engineered for Stable Power Delivery
High Efficiency
DOE Level VI / ErP available by model.
Multiple Protection
OVP / OCP / OLP / SCP / OTP options.
Wide Input Range
100–240VAC, 50/60Hz universal input.
Low Ripple & Noise
Designed for stable output in sensitive devices.
OEM & ODM
Connector, cable, label, housing and packaging support.
Warranty
Standard warranty support for B2B customers.
Certification Support
Global approvals available depending on model and market.
Stable Performance
Continuous power platform.
Connector Options
Default, Optional and Custom Connectors
Default Output Connector
Custom battery connector
Input Connector Options
US Plug, EU Plug, UK Plug, AU Plug, KR Plug, JP Plug
Optional Connector Options
5.5×2.1mm, 5.5×2.5mm, 3.5x1.35mm, Locking Screw, Molex, Customizable
Custom Connector Support
Available on request for OEM/ODM projects
Target Applications
Designed for Common B2B Device Platforms
Rechargeable Devices Power Adapters
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Beauty Equipment Power Solutions
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Technical Data
Technical Specifications
Electrical
Power
Output Voltage
Output Current
Input Voltage
Protection
Efficiency
Ripple & Noise
Mechanical
Input Connector
Output Connector
Cable Length
Environmental
Operating Temp
Storage Temp
MTBF
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Engineering Tips
Engineering Notes for Integration
🔌 Connector Selection
Custom connectors are available.
📏 Cable Length
Longer cables may require thicker gauge to reduce voltage drop.
⚡ Power Margin
For continuous operation, consider 80% loading as a design margin.
🌡️ Operating Temperature
Derating may apply in high ambient-temperature environments.
🔄 Continuous Load
Designed for stable output under rated conditions.
✅ Certification
Verification depends on model, application and target market.
👨🔧 Custom Engineering
Contact our engineering team for special voltage, connector or label needs.
OEM / ODM
Customization & OEM Options
Output Voltage
Output Current
DC Connector
Cable Length
Logo & Label
Packing
documents
Documents & Downloads
Datasheet
Download if available.
CAD Drawing
Request drawing package.
STEP File
For mechanical integration.
Test Report
Available by model.
Resources
Related Resources
📖 Buying Guides
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Frequently Asked Questions
What certifications are available for this model?
Can this product be customized for OEM applications?
How long does it take to charge a single 18650 (2000mAh) cell?
Can this charger work with LiFePO₄ 3.2V batteries?
What protection features are included?
Is the charger compact enough for embedded device integration?
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Same Series / Upgrade / Alternatives
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Customer Success / OEM PROjects
Built for OEM Projects Across Industrial and Electronics Markets
YHYadapter supports OEM customers with custom voltage, connector, label, packaging and certification requirements. Typical projects include industrial automation, medical-related devices, beauty equipment, smart home platforms and audio equipment.
NDA-protected engineering support and sample development are available depending on project requirements.
500+
OEM clients supported
50+
Countries served
2–4w
Typical sample timeline
4–6w
Mass production planning
Manufacturing & Quality
Factory Capability Behind Every Product
Founded in 2010
Power adapter manufacturing experience.
ISO9001
Quality management system.
Burn-in Testing
Reliability validation before shipment.
QC Laboratory
Performance and safety verification.
100,000+ / Month
Mass production capability.
OEM & ODM
Your brand, your specifications.
Global Certifications
Available by model and target market.
V-TRUST Audited
Verified supplier record.
Need a Custom Power Solution?
Contact our engineering team with your voltage, current, connector, cable, target market and quantity requirements.