HW-357 Adjustable 3.7V to 27V Step Up Power Bank Module

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HW-357 Adjustable 3.7V to 27V Step Up Power Bank Module is a high-efficiency DC-DC boost converter module specially designed for battery-powered applications. It allows low input voltages—commonly from single-cell 3.7V Li-ion or LiPo batteries—to be boosted to a higher, adjustable DC output voltage up to 27V.

The module features an onboard precision potentiometer for fine adjustment of output voltage, ensuring stable and accurate power delivery. Its compact size and efficient design make it suitable for portable electronics, DIY power banks, and embedded power systems.

HW-357 is widely used to power devices that require higher voltage than a single battery can provide, such as routers, LED drivers, small DC motors, Arduino/ESP projects, and experimental power electronics setups. Due to its flexibility and efficiency, it is suitable for students, hobbyists, and professionals working on custom power solutions.

🔹 Key Technical Information (Important)

Module Type: DC-DC Step Up (Boost) Converter
Model: HW-357
Input Voltage: 3.7V (typical)
Output Voltage: Adjustable up to 27V
Suitable for Li-ion / LiPo battery input
Output Voltage Adjustment: Onboard potentiometer
High efficiency and stable output
Compact power bank–friendly design

🔹 Common Applications

DIY power bank circuits
Boosting 3.7V Li-ion battery voltage
Portable power supply projects
Arduino and microcontroller power systems
LED and small motor power supply
Electronics learning and experiments

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