This 21V 2.5A Lithium-Ion Battery Charger is specifically designed to charge 5S Li-ion NMC battery packs, which have a nominal voltage of 18.5V and a full charge voltage of 21V. Engineered with an SMPS (Switch Mode Power Supply) design, this adapter efficiently converts AC mains power (100–240V) into a stable 21V DC output at 2.5A, making it ideal for safe, reliable, and high-speed charging.

Ideal for e-bikes, cordless drills, electric toys, balance vehicles, robotics, or DIY electronics, this charger offers optimal performance with built-in protection features.

Features:

1. Optimized for 5S Li-ion NMC battery packs (18.5V nominal, 21V max charging voltage)
2. Wide input voltage: 100–240V AC, 50/60Hz – compatible worldwide
3. Stable output: 21V DC @ 2.5A for fast and safe charging
4. LED indicator: Shows charging and power status at a glance
5. Durable ABS plastic housing: Lightweight, compact, and travel-friendly
6. Secure DC barrel jack output for easy connection

Specifications:

• Input Voltage: 100–240V AC, 50/60Hz
• Output Voltage: 21V DC
• Output Current: 2.5A Max
• Output Power: 52.5W
• Connector Type: DC Barrel Jack
• Body Material: ABS Plastic
• Country of Manufacture: India

Applications:

• Charging 5S Li-ion NMC Battery Packs
• Cordless Drills & Power Tools
• E-Bikes and Balance Vehicles
• LED Headlights and DIY Electronics
• Robotics and Portable Battery Systems

Package Includes:

1 × 21V 2.5A Lithium-Ion Battery Charger (SMPS Adapter)