A USB power bank module is a compact electronic board designed to convert the voltage from a single-cell lithium battery (typically 3.7V nominal) into a stable 5V USB output, allowing it to power or charge USB devices like smartphones, LED lights, or other gadgets.
Key Features:
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Input Voltage: 3.0V – 4.2V (from Li-ion or LiPo cell)
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Output Voltage: 5V (USB standard)
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Output Current: Typically ranges from 1A to 2A, depending on the module
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USB Port: Standard Type-A for easy device connection
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Protection Features: Most modules include overcharge, over-discharge, over-current, and short-circuit protection to ensure battery and user safety.
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Boost Converter: Built-in step-up (boost) circuitry to raise the battery’s voltage to a consistent 5V
Typical Use Cases:
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DIY power banks
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Emergency USB chargers
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Portable electronics projects
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Arduino and Raspberry Pi battery packs
This module is ideal for makers and hobbyists looking to build custom, rechargeable USB power sources using 18650 Li-ion or flat LiPo batteries.
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