Li-ion Battery Charger 4.2V 3A

General Specifications

• Output Voltage: 8.4V DC (suitable for 7.2V or 7.4V nominal 2S battery packs).
• Charging Current: Typically ranges from 1A to 3A, depending on the specific model variant.
• Connector: Most commonly a DC barrel plug (e.g., 5.5x2.1mm or 5.5x2.5mm).
• Safety Features: Often includes short-circuit, over-current, and over-voltage protection.

Operating Instructions & LED Indicators

This charger uses a simple dual-color LED system to communicate status:

• Red LED: Actively charging. The battery is connected and receiving power.

• Green LED: Charging is complete (battery is full) or the charger is disconnected/unloaded.

  Flashing Red/Green: Often indicates a fault, such as a bad battery connection, a defective battery, or a temperature error.

Safety Usage Tips

• Verify Voltage: Ensure your battery pack is a 2-cell (7.2V/7.4V nominal) Li-ion pack before connecting.
• Temperature: Charge in a well-ventilated area between 0°C and 40°C.
• Connection Order: It is generally recommended to plug the charger into the battery first, then into the wall outlet.