Universal 18650 2-Slot Li-ion Battery Charger | Smart Fast Charge

Alasicka Universal 18650 Li-ion Battery Charger — 2-Slot Smart Charging

Keep all your rechargeable lithium batteries topped up and ready to go with the Alasicka 2-Slot Universal Li-ion Battery Charger. Designed for a wide range of cylindrical lithium batteries, this compact and intelligent charger automatically detects battery status and delivers a safe, efficient charge every time — making it the perfect everyday charging companion at home or on the road.

Key Features

• Wide Compatibility: Supports 16340, 16650, 17650, 18350, 18490, 18500, 18650, 20700, 21700, 26650, and more rechargeable lithium-ion battery formats.
• Smart Intelligent Charging: Built-in intelligent recognition automatically detects battery charging status and adjusts accordingly for optimal performance.
• Overcharge & Short Circuit Protection: Integrated smart protection board guards against overcharging and short circuits, keeping your batteries and devices safe.
• Cyclic Charging: Supports cyclic charging to help maintain battery longevity over repeated charge cycles.
• Clear LED Indicator: Red light indicates active charging; green light confirms a full charge — no guesswork required.
• USB-Powered Input: Operates on a standard DC 5V/1A input via USB — convenient for use with power banks, wall adapters, or laptop USB ports.
• Compact & Travel-Friendly: Slim, lightweight design (102 × 47 × 27.5 mm) slips easily into a bag or carry-on for charging on the go.
• CE Certified: Meets CE certification standards for added peace of mind.
• Durable Construction: Fire-resistant housing with excellent heat dissipation and high-temperature resistance for long-lasting, reliable use.

Technical Specifications

What's in the Box

• 1 × Universal 2-Slot Li-ion Battery Charger
• 1 × USB Cable
• Note: Batteries are NOT included.

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Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: Which battery sizes is this 18650 charger compatible with?

A: This universal li-ion battery charger is compatible with a wide range of cylindrical rechargeable lithium batteries, including 16340, 16650, 17650, 18350, 18490, 18500, 18650, 20700, 21700, and 26650 sizes, among others. It's one of the most versatile 2-slot chargers available.

Q: How do I know when my batteries are fully charged?

A: The charger features a simple LED indicator system — a red light shows that charging is actively in progress, and the light switches to green once the battery is fully charged. No display screen is needed; it's that straightforward.

Q: Can I charge two batteries at the same time independently?

A: Yes! The 2-slot design allows you to charge two batteries simultaneously. Each slot operates independently with intelligent recognition, so batteries at different charge levels can both be charged safely and efficiently at the same time.

Q: What power source do I need to use this charger?

A: The charger accepts a standard DC 5V/1A input via USB, making it compatible with most USB wall adapters, power banks, and laptop USB ports — ideal for home use and travel alike.

Q: Does this charger have built-in safety protections?

A: Yes. The Alasicka charger features a built-in intelligent core protection board with overcharge protection, short circuit protection, reverse polarity protection, and a fire-resistant housing with excellent heat dissipation — ensuring safe charging every time.

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.