J5019 HW-357 Li-ion Battery Charger & Boost Converter Module – Adjustable 4.3V to 27V Step-Up for 18650 in Pakistan

Overview 

The J5019 HW-357 is a versatile 2-in-1 power management module. If you are building a project that needs to run on a battery but requires more than 3.7V (like a 9V motor or a 12V LED strip), this is your go-to board. It features a Micro-USB port for easy charging and a high-precision potentiometer to “dial in” your desired output voltage. It’s the perfect foundation for creating portable multimeters, mini-UPS systems, or DIY power banks.

Key Features 

• Dual Functionality: Integrates a lithium battery charging circuit and a DC-DC step-up (boost) converter on a single PCB.

• Adjustable Output: Boost your battery voltage anywhere from 4.3V up to 27V DC.

• Smart Charging: Includes the industry-standard TP4056 charging logic with LED status indicators (Red for charging, Green/Blue for full).

• Ultra-Compact: Smaller than a postage stamp, making it easy to fit into tight enclosures or handheld devices.

• High Efficiency: Modern boost circuitry ensures minimal energy loss during voltage conversion.

Technical Specifications