4.2V 5A 18650 Lithium Battery Charger – US & EU Plug

Fast, Fully Automatic 18650 Lithium Battery Charger

Keep your rechargeable lithium batteries topped up safely and efficiently with the Lamakoki 4.2V 5A Lithium Battery Charger. Designed for 18650 lithium-ion and lithium polymer batteries, this intelligent charger uses CC-CV (Constant Current / Constant Voltage) charging technology to deliver a fast, precise, and battery-friendly charge every time. A simple LED indicator tells you exactly what's happening — red light for charging, green light for fully charged — so there's never any guesswork involved.

Available with both US and EU plug options and featuring a universal AC 100–240V input, this charger works seamlessly across a wide range of outlets worldwide. The 5.5×2.1mm DC barrel connector makes it compatible with a broad selection of flashlights, torches, and other devices that rely on 18650-format batteries.

Key Features

• Input: AC 100–240V, 50/60Hz (universal voltage)
• Charging Voltage: DC 4.2V
• Charging Current: 5A (quick charge capable)
• Charging Mode: CC-CV (Constant Current – Constant Voltage)
• Connector Port: DC 5.5 × 2.1mm barrel
• LED Indicator: Red = Charging | Green = Fully Charged
• Compatibility: Lithium-ion and lithium polymer batteries (18650 and similar formats)
• Certification: CE Certified
• Available Plug Types: US Plug / EU Plug (contact us for AU/UK variants)

Built-In Safety Protections

• Over-Voltage Protection (OVP) — prevents excessive voltage from reaching your battery
• Over-Current Protection (OCP) — limits current to a safe range to protect battery health and longevity
• Overload Protection — automatically manages load to keep the charger operating safely
• Short-Circuit Protection — in the event of improper use, output current is automatically limited to 200mA or less to prevent damage

What's in the Box

• 1 × 4.2V 5A Lithium Battery Charger (US or EU Plug)

Made in Mainland China.

Looking for more electronics accessories? Check out our 10-Pc Hex Nut & Bolt Extractor Kit or browse our 1/2" Drive 8-Piece Hex Short Socket Set for your toolkit needs.

Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What battery types is this 4.2V 5A lithium battery charger compatible with?

A: This charger is designed for lithium-ion and lithium polymer batteries, including the widely used 18650 battery format. It uses a DC 5.5×2.1mm barrel connector, making it compatible with many flashlights, torches, and other devices that use this connector type.

Q: Does this charger work in different countries?

A: Yes. The charger accepts a universal input of AC 100–240V at 50/60Hz, so it can be used in most countries worldwide. It is available in both US and EU plug versions. AU and UK plug variants are also available — simply send a message before ordering to request a specific plug type.

Q: How do I know when my battery is fully charged?

A: The built-in LED indicator makes it easy to monitor charging status at a glance. A red light indicates the battery is currently charging, while a green light signals that the battery is fully charged and ready to use.

Q: Is this charger safe to leave unattended?

A: The charger is equipped with multiple automatic safety protections including over-voltage protection (OVP), over-current protection (OCP), overload protection, and short-circuit protection. These features work together to help keep your battery and charger safe during the charging process. As with any electrical device, always follow general safety guidelines when charging batteries.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.