O4 1S 5V Bec Module
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Unlock digital HD potential on your smallest builds with the Flywoo O4 1S 5V BEC Module. This ultra-micro power supply solution is engineered specifically to power the DJI O4 Air Unit using standard 1S batteries. Whether you are building a custom Tiny Whoop or upgrading a toothpick to digital, this module ensures your video system gets the stable power it needs without brownouts.
Stable 5V/3A Output
Single-cell batteries often sag under load, which can cause hungry HD VTX units to shut down mid-flight. This Flywoo BEC takes an input voltage ranging from 2.65V to 5V and boosts it to a clean, continuous 5V/3A output. This guarantees that your DJI O4 system remains operational even when your 1S battery is pushed to its limit during aggressive maneuvers.
Ultra-Light & Compact
Every gram matters on a micro drone. Weighing in at a nearly invisible 0.4g and measuring just 11mm x 8mm, this module is designed to fit into the tightest canopy spaces of 1.6″ to 2″ drones. It is the definitive solution for converting analog 1S builds to cutting-edge O4 digital HD.
Safe & Cool Operation
Despite its tiny footprint, this BEC is built for performance. In testing at room temperature (25°C), the module stays cool, maintaining temperatures ≤45°C even under a full 3A load. It also features built-in over-temperature protection that automatically reduces frequency to prevent burning, ensuring long-term reliability.
Key Features:
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Optimized for O4: Designed to power DJI O4 Air Units on 1S builds.
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Wide Input: Accepts 2.65V – 5V input (Standard 1S LiPo/LiHV).
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High Output: Delivers a stable 5V/3A continuous current.
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Micro Size: Extremely small footprint (11 x 8 x 2.2mm).
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Featherweight: Only 0.4g (without wires).
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Cool Running: Efficient thermal management prevents overheating.
Specifications:
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Product: FLYWOO O4 1S 5V BEC Module
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Input Voltage: 2.65V – 5V
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Output: 5V / 3A
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Dimensions: 11mm x 8mm x 2.2mm
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Weight: 0.4g
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Compatibility: All 1S-powered 1.6″ – 2″ FPV drones
What’s in the Box?
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1x FLYWOO O4 1S 5V BEC Module
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1x Heat Shrink Film
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4x Silicone Wires (Red/Black)















