4S Li-Battery Boost Charge Module
₵50.00
The 4S Li-Battery Boost Charge Module is a high-efficiency step-up charging board designed to charge a 4-cell (4S) series lithium-ion or lithium-polymer battery pack (nominal 14.8V / full charge 16.8V) from a standard low-voltage DC source like USB Type-C or a 5V power bank.
5 in stock
Key Specifications
| Feature | Specification |
| Input Voltage | DC 3V to 6V (5V DC recommended via USB Type-C / VIN pads) |
| Full Charge Output Voltage | 16.8V DC (4.2V per cell) |
| Maximum Charging Current | ~0.5A to 1.5A (varies depending on input power capacity) |
| Input Interface | USB Type-C or direct solder pads |
| Charging Efficiency | ~90% – 93% |
| Status Indicators | Dual LEDs (Red: Charging / Blue or Green: Fully Charged) |
Key Features
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Synchronous Boost Conversion: Efficiently steps up standard 5V input to the higher 16.8V target required for a full 4S charge.
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Integrated Safety Protections: Offers protection against over-voltage, input under-voltage, over-current, short circuits, and thermal overload.
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Pre-charge & Trickle Charge: Automatically detects deeply discharged cells and uses low-current pre-charging to safely recover the battery pack.
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Auto-Recharge Function: Continuously monitors battery voltage and automatically reinitiates charging when voltage drops below target levels.
Pinout & Connections
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Type-C / VIN (+ / -): 5V DC Power Input
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BAT+ (B+): Connects to the positive (+) terminal of the 4S pack
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BAT- (B-): Connects to the negative (-) terminal of the 4S pack
Common Applications
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Portable 16.8V power packs built with 18650 or 21700 cells
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Drones, RC quadcopters, and high-power robotics
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High-power Bluetooth speaker systems and audio amplifiers
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Field equipment, portable test gear, and DIY power supplies
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