2-Slot Type-C Lithium Battery Charger (16340/14500/18650 Cells)

Overview

The 2-Slot Type-C Lithium Battery Charger is a compact, portable, and reliable USB-C powered charger made for cylindrical lithium-ion rechargeable cells including 16340, 14500, and 18650. It is ideal for hobbyists and professionals who use rechargeable batteries in flashlights, RC models, cameras, DIY electronics, power banks, and other portable devices.

Key Features

• Two independent charging bays so you can charge one or two batteries at the same time without affecting each slot
• USB Type-C input for stable power delivery from wall adapters, laptops, power banks, or car chargers
• Smart charging that auto-adjusts current and stops charging when the battery is full to protect battery life
• LED charging indicators: red for charging and green for fully charged
• Durable ABS plastic housing with spring-loaded contacts for secure fit across supported cell sizes

Input and Connectivity

This charger uses a modern USB Type-C input for improved durability, faster power transfer, and broad compatibility. Use any 5V USB-C power source such as a wall adapter, laptop USB-C port, power bank, or car USB-C charger.

Benefits of USB-C

• Universal compatibility with current chargers and power sources
• Better mechanical durability compared to legacy micro-USB
• Stable 5V input for consistent charging performance

Charging Performance

The charger provides a regulated output optimized for lithium-ion cells. It typically supplies a charging current between 0.5A and 1A per slot depending on input and battery condition. Built-in smart control adjusts parameters to match the cell to help prevent undercharging or overcharging.

Charging Modes and Indicators

• Dual-slot charging: charge two batteries simultaneously with independent control
• Single-slot support: charge a single battery without loss of performance
• Smart cut-off: automatic stop when full to prevent overcharge and extend battery life
• LED indicators: red = charging, green = full

Safety Features

Safety is critical when charging lithium-ion batteries. This charger includes multiple protection circuits to keep both the user and batteries safe.

• Overcharge protection: stops charging when cell reaches full voltage
• Short-circuit protection: prevents damage from faulty cells or abnormal conditions
• Over-discharge recovery: can attempt to revive deeply discharged cells when safe to do so
• Overheat protection: temperature monitoring to avoid unsafe operation
• Reverse polarity protection: guards against incorrect battery insertion

Build Quality and Design

Constructed from durable ABS plastic, the charger is lightweight and built for everyday use and travel. Spring-loaded contacts accept multiple cell lengths and ensure solid electrical contact. The compact form factor fits easily into a bag or toolbox.

Design Highlights

• Portable and lightweight for travel or field use
• Efficient heat dissipation to stay cool during extended charging cycles
• Universal compatibility with USB wall chargers, laptops, and power banks

Technical Specifications

• Input: 5V (USB Type-C)
• Output: approximately 4.2V DC per slot (regulated)
• Compatible battery types: 16340, 14500, 18650 lithium-ion cells
• Number of slots: 2 independent bays
• Charging current: typically 0.5A to 1A per slot (auto-adjust)
• Indicators: LED (Red = Charging, Green = Fully Charged)
• Protections: overcharge, over-discharge recovery, overheat, short-circuit, reverse polarity

Applications

• Rechargeable LED flashlights and torches
• RC cars, drones, helicopters, and remote-controlled toys
• DIY electronics projects and robotics
• Portable fans, radios, and small household appliances
• Power banks and backup battery packs
• Any device powered by 16340, 14500, or 18650 lithium-ion batteries

Why Choose This Charger?

• Universal compatibility with the most common cylindrical lithium-ion battery sizes
• Modern Type-C interface for reliable, future-proof connectivity
• Independent charging slots so you do not need matched pairs to charge simultaneously
• Compact and portable design suited for travel or everyday carry
• Enhanced safety features to give you peace of mind while charging

What’s in the Box

• 2-Slot Type-C Lithium Battery Charger
• USB Type-C to USB-A cable (or USB-C cable depending on bundle)
• User manual

Usage Tips

• Use a quality 5V USB-C power source that can supply sufficient current for two slots if charging simultaneously
• Insert batteries in the correct orientation to avoid activating reverse polarity protection
• Allow batteries to cool before charging again after heavy use
• Do not leave batteries unattended for extended periods even with protections enabled

This 2-Slot Type-C Lithium Battery Charger provides a safe, efficient, and convenient way to keep your 16340, 14500, and 18650 cells ready for use. Whether you need a compact charger for travel or a reliable everyday charger for home and workshop use, this charger covers the essentials with modern connectivity and robust safety features.