The 4.2V 2A Li-ion Battery Charger (Model: 04220) is a dedicated power solution engineered for the safe and efficient charging of single-cell (1S) lithium-ion battery packs. Delivering a stable 2A (2000mA) output, this adapter is ideal for high-drain electronics that require a precise voltage threshold, including tactical flashlights, portable medical devices, and custom DIY lithium projects.
Featuring an intelligent charging profile and a standard 3-pin plug, the 04220 ensures your single-cell batteries are topped up rapidly while maintaining long-term cell health.
Intelligent LED Status Monitor: Includes integrated visual indicators: Red for active charging and Green once the battery reaches its optimal full charge.
High-Efficiency 2A Output: Provides a consistent 2A current calibrated for 4.2V systems, offering significantly faster charging than standard 500mA or 1A adapters.
Dual-Size DC Connector: Features a reinforced barrel plug designed for versatility, compatible with both 1.7mm and 2.5mm internal pin configurations.
Universal Input Range: Fully compatible with global AC standards (110V–240V), making it reliable for use in various regions.
Comprehensive Protection Suite: Engineered with multi-layer safeguards against over-voltage, short-circuits, and over-current to preserve your battery assets.
Grounded 3-Pin Construction: The integrated Type G plug ensures a stable and secure connection to standard wall outlets.
Input Voltage: AC 110V – 240V, 50/60Hz.
Output Voltage: DC 4.2V.
Output Current: 2A (2000mA).
Plug Type: 3-Pin (UK/Malaysia Standard).
DC Connector Size: 1.7mm / 2.5mm.
Tactical Flashlights: The standard rapid-charging solution for high-capacity 18650 or 26650 single-cell lights.
Portable Electronics: Ideal for 4.2V powered handheld fans, beauty tools, and portable speakers.
DIY Hobbyist Projects: A reliable power source for projects utilizing single-cell Li-ion configurations.
Measurement Tools: Powering precision digital scales or portable diagnostic equipment requiring 4.2V input.
Can I use this for a 3.7V battery? Yes. Lithium-ion cells are often labeled as "3.7V" (nominal voltage), but they require a 4.2V charger to reach their full peak charge capacity.
Will a 2A output damage a small battery? Most standard 18650 or larger cells can handle a 2A charge safely. However, for very small cells (under 1000mAh), check the battery's maximum charge rate to ensure 2A is within its safe operating limits.
Why is the Green light on even if the battery feels empty? This can happen if the battery's internal protection board (BMS) has tripped or if the battery has reached its end of life and can no longer accept a charge. Ensure the DC plug is firmly connected.
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