This 4.2V 2A Lithium Battery Charger is a reliable and efficient charging solution for single-cell (1S) 18650 and compatible lithium-ion battery packs. Engineered with CC-CV (Constant Current – Constant Voltage) technology, it ensures stable charging without the risk of overcharging, prolonging battery lifespan and maintaining safety.

Key Features:

• CC-CV Charging: Precise constant current/voltage regulation for optimal battery health
• Intelligent Charging Indicator: Red for charging, green for fully charged
• Dual Plug Support: Compatible with both DC5.52.1mm and DC5.52.5mm ports
• Wide Input Range: AC 100-240V suitable for international use
• Built-in Safety Protections: OVP (Over-voltage), OCP (Over-current), overload, and short-circuit protection
• Compact and Portable: Easy to carry and store with minimal footprint

Technical Specifications:

• Input: AC 100–240V, 50/60Hz, 0.8A
• Output Voltage: DC 4.2V
• Output Current: 2A
• Charging Mode: CC-CV
• Charge Indicator: Red = Charging / Green = Full
• Charger Port: DC 5.52.1mm / DC 5.52.5mm
• Dimensions: 76 × 43 × 30 mm
• Application Range: For 1S lithium battery packs with nominal voltage 3.7V, full charge voltage 4.2V, capacity range 1100–5500mAh. Compatible cell types include 18650, 18490, 14650, 14500, and 14430.

Protective Functions:

1. Input Overcurrent Protection: Automatic fuse cut-off at >1A input surge
2. Output Current Regulation: Prevents overcharging, extends battery life
3. Short-Circuit Protection: Output capped at 200mA under shorted conditions to prevent damage