22.5W Type-C Li-ion 18650 Battery Charging Circuit - Power Bank Module with USB Output

22.5W Type-C Li-ion 18650 Battery Charging Circuit - Power Bank Module with USB Output

The 22.5W Type-C Li-ion 18650 Battery Charging Circuit (Power Bank Module with USB Output) is a compact power management board designed to create a portable fast-charging device using single-series Li-ion or Li-Po batteries with a nominal voltage of 3.7V.

The module operates with a 1S 3.7V lithium battery system and is compatible with 18650 cells that have a full-charge voltage of approximately 4.2V. If multiple cells are used, they must be connected in parallel. Series connection is not supported, and excessive battery voltage may damage the module.

The board features a bidirectional USB Type-C connection. When an external fast-charging adapter is connected, the Type-C port acts as an input to charge the battery; conversely, when used as a power bank, the same port provides output power to connected devices.

The board also features a high-current USB-A output.

Specifications

• Maximum Output Power: 22.5W
• Battery Configuration: 1S
• Battery Nominal Voltage: 3.7V
• Fully Charged Battery Voltage: 4.2V
• USB Type-C: Bidirectional input/output
• USB-A: Fast charging output
• Maximum Charging Current: Up to 5A, depending on operating conditions
• Maximum Conversion Efficiency: Up to 96%
• Typical Overall Efficiency: Up to 95%
• PD Support: PD2.0 / PD3.0
• Quick Charge: QC2.0 / QC3.0 / QC4.0

Supported Fast Charging Protocols

• PD2.0
• PD3.0
• PPS
• QC2.0
• QC3.0
• QC4.0
• AFC
• FCP
• SCP
• VOOC
• DASH
• WARP
• PE1.1
• PE2.0
• SFCP
• HSCP
• BC1.2 / Apple 5V 2.4A