The Li-ion Battery Universal Dual Charger is a versatile and compact charging solution for 3.7V rechargeable lithium-ion batteries, including 18650, 14500, 10440, and 16340 cells. With two independent charging channels, you can charge one or two batteries simultaneously.
Powered via a standard USB input, this charger features smart charging technology with automatic cut-off, overcharge protection, and reverse polarity protection. LED indicators make it easy to monitor the charging status—Red for charging, Green for fully charged.
This charger is ideal for a wide range of applications including flashlights, RC vehicles, Arduino projects, IoT systems, and robotics.
⭐ Key Features:
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🔋 Supports 3.7V Li-ion batteries: 18650, 14500, 10440, 16340
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🔌 Dual charging slots – charge two batteries simultaneously
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⚡ Smart Charging: Auto cut-off and overcharge protection
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💡 LED Indicators: Red (Charging), Green (Full)
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🔧 USB-powered – compatible with power banks, adapters, laptops
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🛡️ Reverse polarity and short-circuit protection
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📦 Compact, portable, and safe for everyday use
⚙️ Technical Specifications:
| Specification | Details |
|---|---|
| Input Voltage | 5V USB (DC) |
| Output Voltage | 4.2V (per slot) |
| Charging Current | ~500mA per battery (approx.) |
| Supported Batteries | 18650, 14500, 10440, 16340 (3.7V Li-ion) |
| Charging Slots | 2 Independent Channels |
| Indicators | Red = Charging, Green = Fully Charged |
| Protection | Overcharge, Short-Circuit, Reverse Polarity |
| Use Cases | Flashlights, IoT, Arduino, Robotics, Power Tools |
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