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:

• Optimized for O4: Designed to power DJI O4 Air Units on 1S builds.

• Wide Input: Accepts 2.65V – 5V input (Standard 1S LiPo/LiHV).

• High Output: Delivers a stable 5V/3A continuous current.

• Micro Size: Extremely small footprint (11 x 8 x 2.2mm).

• Featherweight: Only 0.4g (without wires).

• Cool Running: Efficient thermal management prevents overheating.

Specifications:

• Product: FLYWOO O4 1S 5V BEC Module

• Input Voltage: 2.65V – 5V

• Output: 5V / 3A

• Dimensions: 11mm x 8mm x 2.2mm

• Weight: 0.4g

• Compatibility: All 1S-powered 1.6″ – 2″ FPV drones

What’s in the Box?

• 1x FLYWOO O4 1S 5V BEC Module

• 1x Heat Shrink Film

• 4x Silicone Wires (Red/Black)