21V 2A Lithium Battery Charger – DC 5.5x2.1mm Drill Charger

21V 2A Smart Lithium Battery Charger with DC 5.5×2.1mm Connector

Keep your power tools, flashlights, and electronic weighing equipment running at full capacity with this CE-certified 21V 2A Lithium Battery Charger. Designed for lithium-ion and lithium polymer battery packs, it features intelligent CC-CV charging technology that automatically adjusts to deliver the optimal charge every time — protecting your battery and extending its lifespan.

With a universal AC 100–240V input, this charger works worldwide with EU, US, and UK plug options. The generous 1.5-metre DC cable gives you flexible reach, and the built-in LED indicator makes it easy to monitor charging status at a glance: red = charging, green = fully charged.

Key Features

• Output: DC 21V / 2A — ideal for 18V–21V lithium battery packs
• Input: AC 100–240V, 50/60Hz — universal voltage compatibility
• Charging Mode: CC-CV (Constant Current – Constant Voltage) for smart, safe charging
• Connector: DC 5.5 × 2.1mm barrel plug with 1.5m cable
• Quick Charge: Yes — faster top-up without compromising battery health
• LED Indicator: Red (charging) / Green (fully charged)
• Certification: CE certified
• Compatible With: Lithium-ion & lithium polymer batteries for drills, flashlights, electronic scales, and more

Multi-Layer Safety Protection

1. Input Over-Current Protection (OCP): Automatically cuts the fuse if input current exceeds safe limits, preventing internal circuit faults and fire risk.
2. Output Current Protection (OVP): Keeps charging current within a safe range to preserve battery integrity and longevity.
3. Short-Circuit Protection: Limits output to 200mA or less in the event of improper use, preventing damage to your battery and charger.
4. Overload Protection: Shuts down automatically if power draw exceeds rated limits.

Technical Specifications

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Frequently Asked Questions

Q: What types of batteries is this 21V lithium charger compatible with?

A: This charger is designed for lithium-ion and lithium polymer battery packs rated at 18V–21V. It is commonly used with cordless drills, power tool batteries, LED flashlights, and electronic weighing devices equipped with a DC 5.5×2.1mm charging port.

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

A: The built-in LED indicator makes it simple — a red light means the battery is actively charging, and a green light means the battery is fully charged and ready to use.

Q: Is this charger safe to use worldwide?

A: Yes. The charger accepts AC 100–240V input at 50/60Hz, making it compatible with power outlets across most countries. EU, US, and UK plug versions are available. If you need a different plug specification, please contact us before ordering.

Q: What safety protections does this charger include?

A: This charger features four layers of protection: input over-current protection (OCP), output voltage protection (OVP), overload protection, and short-circuit protection. These work together to keep both the charger and your battery pack safe during every charge cycle.

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.