18W Type-C Lithium Battery Fast Charger Module | LED Indicator
18W Type-C Lithium Battery Fast Charger Module | LED Indicator
Power your DIY builds with confidence using this compact 18W Lithium Battery Fast Charger Module. Designed for makers, hobbyists, and engineers, this Type-C boost charging module delivers rapid, multi-protected charging and discharging for 3.7V/4.2V lithium batteries — ideal for drone battery packs, power banks, and custom electronics projects.
Key Features
- Single Type-C Port Input/Output: Supports fast charging in and power delivery out through one convenient USB-C port — no need for multiple connectors.
- LED Battery Level Indicator: Intuitive LED lights give you a real-time, at-a-glance view of charging status and remaining battery level. Press the button to check charge level anytime.
- 18W Fast Charging: Supports 5V 3A / 9V 2A / 12V 1.5A charging and discharging protocols for fast, efficient power delivery.
- Wide Compatibility: Works with 3.7V/4.2V lithium batteries (default) and 3.85V/4.35V batteries via reserved shorting pad — perfect for drone batteries, DIY power banks, and more.
- Comprehensive Multi-Protection: Built-in overvoltage, undervoltage, overcurrent, overcharge, overdischarge, and over-temperature protection safeguards your batteries and extends service life.
- Compact PCB Design: Tiny 28×18×5mm footprint with reserved M2 fixing holes makes it easy to integrate into space-constrained builds.
Specifications
| Charging/Discharging Power | 18W (5V 3A / 9V 2A / 12V 1.5A) |
| Supported Battery Voltage | 3.7V/4.2V (default); 3.85V/4.35V (reserved shorting pad) |
| PCB Size | 28 × 18 × 5 mm |
| Fixing Holes | M2 screw compatible |
| Max Battery-End Current | Up to 5A |
| Recommended Battery Capacity | 10,000 mAh or greater |
| Country of Origin | Made in Mainland China |
Important Usage Notes
- Polarity: Always observe the correct positive/negative orientation at the battery interface. Incorrect connection can cause a fire hazard.
- Initial Setup: Before connecting the battery, connect the charger first. A steady indicator light confirms the module is functioning normally. Once verified, solder the battery, then connect the charger to activate the module before enabling external output.
- Cable Requirements: Use silicone cable rated at 20AWG or thicker for battery connections. Keep connection length under 7.5 cm for optimal performance.
- Battery Recommendation: Use a high-capacity (10,000 mAh+), low-internal-resistance, high-discharge-rate lithium battery for best results. Old batteries with high internal resistance may cause inaccurate charge level readings.
- Heat Management: During fast charging, the module will generate noticeable heat. On-chip over-temperature protection will reduce current if needed. For sustained full-power operation, attach a heatsink to the back of the chip. Do not touch the heat dissipation area during charging.
- Protocol Compatibility: The Type-C port requires a device with a recognized charging protocol on the CC terminal. Devices without protocol support will not trigger output.
What's in the Box
- 1× 18W Lithium Battery Fast Charger Module
For more information on safe DIY electronics practices and electrical safety standards, visit CPSC Electrical Safety.
Frequently Asked Questions
Q: What lithium battery voltages does this fast charger module support?
A: The module supports 3.7V/4.2V lithium batteries by default. It also supports 3.85V/4.35V batteries through a reserved shorting pad on the PCB, giving you flexibility for a wider range of lithium cell types used in drones and power banks.
Q: Can this module charge and discharge at the same time?
A: This module is designed for charging or discharging through the same Type-C port. It is not intended for simultaneous pass-through charging and discharging. Always follow the setup sequence in the usage notes for safe operation.
Q: What is the recommended battery capacity for this 18W charger module?
A: Due to the high power output of this fast charging module (up to 5A at the battery end), it is recommended to use a lithium battery with a capacity of 10,000 mAh or greater with a low internal resistance and a high discharge rate for safe and accurate operation.
Q: Why does my charger module get warm during fast charging?
A: At 18W, the module processes significant power in a very compact form factor. Some heat generation is normal. The onboard over-temperature protection will automatically reduce charging current to keep the chip safe. For sustained high-power use, adding a heatsink to the back of the PCB is strongly recommended.