J5019 HW-357 18650 Li-ion Battery Charger & DC-DC Boost Module

J5019 HW-357 Li-ion Battery Charger & DC-DC Boost Converter Module

Buy the J5019 HW-357 Lithium Battery Charger and DC-DC Boost Converter Module online in Pakistan from Robostan.pk. This compact 2-in-1 power management module combines single-cell lithium-ion battery charging with adjustable step-up voltage conversion for portable electronic devices, 18650 battery projects, robotics, and DIY power supply applications.

The J5019 HW-357 supports charging compatible 3.7V nominal lithium-ion batteries using a Micro USB power input while providing an adjustable boosted DC output for powering compatible electronic loads.

With a commonly specified 4.5V to 8V DC input range, 4.2V battery charging voltage, and adjustable 4.3V to 27V DC boost output, this board is a convenient solution for low-power rechargeable electronic projects.

Key Features

• J5019 HW-357 2-in-1 charger and boost converter
• Single-cell lithium-ion battery charging
• Compatible with suitable 3.7V 18650 and LiPo cells
• Micro USB charging input connector
• Adjustable DC-DC step-up voltage output
• Output adjustable from approximately 4.3V to 27V
• Commonly specified 4.5V to 8V DC input range
• 4.2V nominal lithium battery charging voltage
• Charging current up to approximately 1A
• Maximum advertised discharge current up to 2A, subject to operating conditions
• Onboard output voltage adjustment potentiometer
• Compact PCB design for portable projects
• Suitable for battery-powered electronics
• Useful for Arduino, IoT, and robotics power projects

Technical Specifications

• Product Name: J5019 HW-357 Charger Boost Module
• Model: J5019 / HW-357
• Module Type: Li-ion Charger and DC-DC Step-Up Converter
• Battery Configuration: 1S Single Cell
• Supported Battery: Compatible 3.7V Li-ion / LiPo
• Typical Battery Charge Voltage: 4.2V DC
• Input Voltage: 4.5V to 8V DC, module-dependent
• Recommended USB Input: Regulated 5V DC
• Output Voltage: Approximately 4.3V to 27V DC
• Voltage Adjustment: Onboard Potentiometer
• Maximum Charging Current: Approximately 1A
• Advertised Maximum Discharge Current: 2A
• Input Connector: Micro USB
• Power Conversion: DC-DC Boost / Step-Up
• Approximate PCB Dimensions: 33 x 23mm
• Mounting: PCB Module

Applications

• 18650 lithium battery charging projects
• DIY rechargeable power supplies
• Portable electronics development
• Battery-powered Arduino projects
• ESP32 and IoT power supply projects
• Small 5V and 9V electronic devices
• Portable measuring instruments
• Rechargeable LED lighting projects
• DIY power bank experiments
• Battery backup circuit prototypes
• Robotics and automation systems
• Educational electronics projects

Integrated Lithium Battery Charging

The J5019 HW-357 features an onboard charging circuit designed for compatible single-cell lithium-ion batteries.

A suitable regulated 5V supply can be connected through its Micro USB port to recharge a connected battery using the module's charging circuitry.

The charging current depends on the board configuration, power source, battery condition, and thermal limits.

Adjustable DC-DC Boost Converter

The module includes a step-up converter that allows a single-cell lithium battery to power electronic devices requiring a higher DC voltage.

The output voltage can be adjusted using the onboard potentiometer. Common project voltages include 5V, 9V, and 12V, provided the load requirement remains within the converter's practical operating limits.

As output voltage increases, the available output current generally decreases. High-voltage settings should only be used with appropriately low-power loads.

18650 Battery Compatibility

The J5019 HW-357 is commonly used with 3.7V nominal rechargeable lithium-ion batteries, including compatible 18650 cells.

For safe operation, use a suitable battery protection circuit and observe correct battery polarity.

This module is intended for single-cell charging and is not suitable for directly charging 2S or 3S series lithium battery packs.

Why Choose J5019 HW-357?

2-in-1 Design: Combines battery charging and adjustable voltage boosting on one compact circuit board.

Adjustable Output: Provides flexibility for different low-power DC applications.

Micro USB Input: Convenient charging connection using a compatible 5V USB power source.

Compact Size: Suitable for portable electronics and space-constrained projects.

Versatile Applications: Useful for battery-operated electronics, DIY robotics, and embedded development.

Important Usage Notes

• Use compatible single-cell 3.7V lithium-ion batteries only.
• Verify correct battery polarity before connecting.
• Use a stable, regulated 5V USB power source.
• Measure and adjust the output voltage before connecting sensitive electronics.
• Do not assume the module can deliver 2A at every output voltage.
• Actual output current depends on voltage, efficiency, and thermal conditions.
• Use a suitable lithium battery protection circuit where required.
• Do not connect damaged, swollen, or unsuitable batteries.
• Do not assume uninterrupted UPS operation without checking the board's power-path behavior.
• Check the actual PCB markings and connections before installation.

Package Contents

• 1 x J5019 HW-357 Lithium Battery Charger and Boost Converter Module

Battery, USB cable, and other accessories are not included unless specified separately.

Buy J5019 HW-357 Module in Pakistan

Looking for a J5019 HW-357 18650 Battery Charger and DC-DC Boost Converter in Pakistan? Shop online at Robostan.pk for lithium battery modules, DC-DC converters, battery holders, charging circuits, microcontrollers, and robotics components.

Order your J5019 HW-357 Module from Robostan.pk with nationwide delivery across Pakistan, including Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar, and other cities.

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