Universal Dual-Slot Li-Ion Battery Charger (18650, 14500, CR123A) – EU Plug

Universal Dual-Slot Li-Ion Battery Charger – EU Plug

Keep your robotic projects powered up and ready to deploy with this Universal Dual-Slot Li-Ion Battery Charger. Designed with spring-loaded negative contacts, this versatile wall charger automatically adjusts to securely fit and charge a wide variety of cylindrical lithium-ion cells, including the popular 18650, as well as 16340, 14500, 17670, and CR123A sizes.

Why choose this charger?

• True Universal Fit: You don’t need a different charger for every battery size. The sliding metal contacts adapt seamlessly from short CR123A cells all the way up to large 18650 cells.
• Integrated EU Plug: Features a built-in standard EU plug (two round pins) that goes directly into your wall socket. No easily lost cables or extra power bricks required.
• Independent Charging Channels: The two slots operate independently. You can charge a single battery, or charge two batteries of completely different sizes at the exact same time safely.

Common Applications

• Recharging 18650 batteries for mobile robot chassis
• Charging 14500 (AA-sized Li-Ion) cells for DIY electronics
• Keeping tactical flashlights (CR123A) powered
• Maintaining power banks for IoT edge nodes

Technical Specifications

Feature	Specification
Supported Batteries	18650, 16340, 14500, 17670, CR123A
Chemistry Compatibility	Lithium-Ion (Li-Ion) 3.7V ONLY
Input Voltage	AC 100V – 240V (50/60Hz)
Output Voltage	DC 4.2V (Max Charging Voltage)
Plug Type	EU Standard (2 Round Pins)
Charge Indicator	LED (Red = Charging, Green = Full)

Common Questions

Can I charge my TV remote’s AA or AAA batteries in this?

No! Standard AA and AAA batteries are NiMH or Alkaline with a 1.2V-1.5V rating. This charger outputs 4.2V specifically for Lithium-Ion cells. Putting standard household batteries in this charger will permanently damage them and poses a serious fire risk.

How do I know when my batteries are fully charged?

The charger features a simple LED indicator on the front. It will glow Red while the batteries are actively charging, and automatically turn Green when the cells have reached full capacity (4.2V).

Do I need an adapter to plug this into the wall?

This model comes with a standard EU 2-Pin Plug. If your wall sockets are Indian standard 3-pin or 2-pin round sockets, this will plug in directly without any issues. No extra adapters or USB cables are needed.

Do I have to charge two batteries at the same time?

No, the charging channels are completely independent. You can charge a single battery by itself, or charge two batteries of completely different sizes (like one 18650 and one CR123A) simultaneously safely.