Dual 18650 Lithium Battery Charger 4.2V

Reliable dual-slot charging for your 18650 batteries.

This dual 18650 battery charger is designed specifically for 3.7V rechargeable lithium 18650 cells, charging them safely up to the standard 4.2V cut-off voltage. With two independent charging bays, you can charge one or two batteries at the same time without affecting each other's performance or safety.

The charger uses an intelligent charging circuit that automatically detects battery status and adjusts the charging current accordingly. Integrated protection features help guard against overcharge, overheating, and short-circuit conditions to support consistent performance and longer battery life. Each slot includes an LED indicator that clearly shows charging status and full-charge completion, so you can see at a glance when your batteries are ready to use.

Its compact, lightweight design makes it easy to keep on your desk, in your toolkit, or in a travel bag. Compatible with common USB power sources (such as wall adapters, power banks, or car USB ports via an appropriate cable or adapter), this charger is a practical solution for keeping 18650-powered flashlights, headlamps, tools, and other electronics ready to go.

Why It's a Smart Choice

• Dual independent slots - Charge one or two 18650 batteries at the same time with separate control and monitoring for each bay.
• Intelligent 4.2V charging - Optimized charging profile for 18650 lithium cells helps support faster, safer, and more consistent charging.
• Built-in safety protection - Overcharge, overheat, and short-circuit protection help reduce risk and support longer battery lifespan.

FAQ

Q: Which batteries are compatible with this charger?
A: This charger is designed for standard 3.7V rechargeable lithium 18650 batteries that charge up to 4.2V. It is not intended for NiMH, NiCd, or non-rechargeable cells.

Q: Can I charge only one battery at a time?
A: Yes. Each slot operates independently, so you can charge a single 18650 battery or two at once.

Q: How do I know when the batteries are fully charged?
A: The LED indicator for each slot changes status when charging is complete, clearly showing that the battery has reached full charge.

Q: What power sources can I use?
A: The charger can be powered from a compatible USB power source such as a USB wall adapter, power bank, or car USB port, using an appropriate cable or adapter (not always included, depending on the package).