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The 4.2V 1A wall power supply charger is designed for charging single-cell lithium batteries (Li-ion / Li-Po). It provides stable voltage and current using a constant current and constant voltage charging method, ensuring safe and reliable battery charging.
This charger is commonly used for 18650 batteries, portable electronics, LED devices, DIY electronics, and battery packs.
Technical Specifications
• Input voltage: AC 100–240V, 50/60Hz
• Output voltage: 4.2V DC
• Output current: 1A (1000 mA)
• Output power: about 4.2W
• Charging method: CC/CV (constant current / constant voltage)
• Battery compatibility: 3.6V / 3.7V lithium batteries (1S Li-ion / Li-Po)
• Connector type: typically DC 5.5 × 2.1 mm
• LED indicator:
• Red – charging
• Green – fully charged
• Protection: overcharge, short circuit and overcurrent protection
Applications
• Charging 18650 lithium batteries
• Portable electronics projects
• LED flashlights and devices
• DIY battery packs
• Microcontroller and IoT devices
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