The 21V 2A Li-ion Battery Charger (Model: BC2120) is a heavy-duty power solution specifically designed for the high-speed charging of 5-cell (5S) lithium-ion battery packs. Delivering a consistent 2A (2000mA) output, this charger is engineered for professional equipment that requires higher voltage thresholds, such as high-torque cordless power tools and advanced robotics.
Featuring an intelligent charging profile and a standard UK/Malaysia 3-pin plug, the BC2120 ensures that your high-capacity batteries are topped up safely and efficiently, minimizing downtime in professional environments.
Intelligent LED Status Monitor: Integrated visual indicators provide at-a-glance status: Red for active charging and Green once the battery has reached its optimal full charge.
High-Voltage 2A Output: Provides a powerful 2A current calibrated for 21V systems, offering rapid charging for large-capacity Li-ion packs.
Dual-Size DC Connector: Features a reinforced barrel plug designed for versatility, compatible with both 1.7mm and 2.5mm internal pin configurations.
Universal Input Range: Fully compatible with global AC standards (110V–240V), making it a reliable choice for travel or varying grid conditions.
Industrial Safety Suite: Built with multi-layer protection against over-voltage, short-circuits, and over-current to preserve the long-term health of your lithium cells.
Robust 3-Pin Construction: The integrated Type G plug ensures a grounded, stable connection to any standard domestic or workshop wall outlet.
Input Voltage: AC 110V – 240V, 50/60Hz.
Output Voltage: DC 21V.
Output Current: 2A (2000mA).
Plug Type: 3-Pin (UK/Malaysia Standard).
DC Connector Size: 1.7mm / 2.5mm.
Cordless Power Tools: The standard charging solution for 21V lithium battery packs used in heavy-duty drills, saws, and angle grinders.
High-Torque Robotics: Providing reliable energy for large-scale robotic projects and automated machinery.
Electric Mobility: Suitable for specialized 21V electric scooters, skateboards, or assisted mobility devices.
Industrial Measurement Gear: Powering high-voltage portable diagnostic and surveying equipment.
Can I use this for an 18V battery? Generally, no. A 21V charger is designed for a 5S Li-ion pack (which has a nominal voltage of 18V but a peak charge of 21V). Always verify the "Charge Voltage" labeled on your battery pack; if it says 21V, this is the correct charger.
Will it damage my battery if it charges too fast? The 2A current is a "sweet spot" for most modern high-capacity 18V/21V packs. It provides a fast charge without generating excessive heat, which helps maintain the internal chemistry's lifespan.
Why is the Green light on even when the battery isn't full? This can happen if the battery’s internal protection circuit (BMS) has tripped or if there is a loose connection. Ensure the DC plug is firmly seated in the charging port.
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