HW-357 (J5019) Adjustable Booster and Battery Charger - DC UPS Module

• J5019 HW-357 is an all-in-one TP4056 lithium battery charger and DC-DC boost converter board for compact DIY power systems.
• Supports 3.7V lithium batteries such as 18650 and 14500, with charging and boost output in one module.
• Adjustable output voltage from 4.3V to 27V makes it suitable for a wide range of electronics projects.
• Can charge the battery while also powering a load, making it useful for UPS-style backup applications.
• Accepts 5V USB or solar input and offers up to 1A charging current with efficient step-up conversion.
• Ideal for portable electronics, Arduino projects, sensor systems, solar charging, and multimeter power upgrades.

Features:

1. Combines lithium battery charging and boost conversion in one compact board, reducing wiring complexity and saving space.
2. Uses the TP4056 charging IC for stable 4.2V lithium battery charging.
3. Adjustable output voltage from 4.3V to 27V allows flexible use with many electronics and DIY devices.
4. Supports simultaneous charging and load output, making it suitable for compact UPS and backup power designs.
5. Works with common 3.7V lithium cells including 18650 and 14500 battery types.
6. Accepts 4.5V to 8V DC input, including 5V USB sources and compatible solar charging setups.
7. Delivers up to 1A charging current and up to 2A discharge current for practical low-power to medium-power applications.
8. High conversion efficiency of up to 93 percent helps reduce energy loss and improve battery runtime.
9. Compact module size makes it easy to integrate into portable enclosures and embedded projects.
10. Suitable for hobby, educational, repair, and prototype use where regulated battery-powered output is needed.

Applications:

1. Build a small UPS power backup system for routers, sensors, or low-power embedded devices.
2. Create battery-powered Arduino, ESP32, and IoT projects that need boosted output voltage.
3. Use in solar-assisted charging systems for light off-grid electronics applications.
4. Power portable testers, multimeters, and handheld DIY instruments from a rechargeable lithium cell.
5. Develop compact power banks or custom rechargeable supply modules for experimental electronics.
6. Run sensors, modules, and communication boards that require a stable adjustable DC output.
7. Integrate into educational electronics projects to demonstrate charging, boosting, and battery management concepts.
8. Use in small robotics and automation circuits where lightweight rechargeable power is preferred.