The HUAWEI FreeBuds SE 3 has been upgraded to Bluetooth 5.4, providing stable connectivity and low-latency playback. It features multiple preset EQs to meet personalized audio needs. When paired with Huawei phones/tablets, it supports automatic pop-up windows. Through the Huawei AI Life App, users can customize controls, find the headset, and more. The single charge offers up to 9 hours of battery life, with a total of 42 hours of music playback.
We have previously disassembled other HUAWEI products, including the HUAWEI FreeClip, HUAWEI FreeBuds Pro 3, HUAWEI FreeBuds SE 2, HUAWEI FreeBuds 5, HUAWEI FreeBuds Studio, HUAWEI FreeLace Pro 2, HUAWEI Sound SE, HUAWEI Sound Joy, HUAWEI Mate 70, HUAWEI Pocket 2, HUAWEI MateBook X Pro 2024, HUAWEI Watch GT5, HUAWEI Watch Fit 3, HUAWEI Watch Buds, and HUAWEI Watch GT Cyber. Below is a detailed teardown report of the HUAWEI FreeBuds SE 3.
01/ HUAWEI FreeBuds SE 3 Charging Case Teardown
After opening the charging case shell, the charging bin structure is removed. The front structure of the charging bin (left side) – the battery is fixed via a frame, and the bottom is secured to the mainboard with screws.
The back structure of the charging bin – a metal rod is installed for Hall effect sensing to enable the open-cover connection function.
After removing the screws, the battery and mainboard on the charging bin are taken out – the battery wires are soldered to the mainboard.
The charging case is equipped with a lithium-ion polymer battery, model: HB751834ENW-11, rated capacity: 510mAh/1.97Wh/3.87V, charging limit voltage: 4.45V, made in China, from ATL.
Remove the cushioning pad of the function button. The circuit on one side of the charging case mainboard.
The circuit on the other side of the charging case mainboard.
The metal dome connector for charging the earbuds.
iCM CM1125 series integrated MOSFET single-cell lithium battery protection IC, responsible for overcharge, over-discharge, and over-current protection of the battery.
A Hall element with the marking AG 4m, used to sense the magnetic field changes when the charging case is opened/closed, thereby notifying the charging case MCU and the earbuds to pair or disconnect with the connected device.
A function button for bluetooth pairing.
LED indicators for providing feedback on bluetooth pairing and remaining battery information.
An IC with the marking AAS5.
A TVS tube with the marking 17P, used for input overvoltage protection.
An overvoltage and overcurrent protection IC with the marking N2012 LR.
SinhMicro SS888AH Power MCU, integrating power management functions; built-in operational amplifier, with rich functions and interfaces, flexible configuration modes, and different low-power options.
02/ HUAWEI FreeBuds SE 3 Earbuds Teardown
Remove the back cover of the earbud stem. The inner side of the cover is equipped with a bluetooth antenna and touch detection patch. A mainboard unit is set in the cavity, welded to the wires, and fixed and sealed with a large amount of glue around it.
Remove the mainboard unit.
The circuit on one side of the earbud mainboard.
The circuit on the other side of the earbud mainboard.
WQ7031M main control chip.
Sunlord SDCL0603Q series multilayer ceramic inductors around the bluetooth chip. This series of products achieves high Q value and high self-resonant frequency (SRF) through coils and electrodes. Made using multilayer dry process technology, it provides high precision and consistency, meeting the stringent requirements of precision electronic components.
WINSEMI WSDF2310 lithium battery protection IC. It uses DFN-1*1 ultra-small package, with overcharge, over-discharge, over-current, and short-circuit protection functions. Supports CTL shipping mode, with a standby current of less than 10nA during operation.
A metal dome connecting the bluetooth antenna and touch detection patch.
A crystal oscillator with the marking YL160, providing clock signals for the bluetooth chip.
A MEMS microphone with the marking R4CT, used for voice call pickup, from RAYKING.
Disassemble the earbud head.
Remove the battery unit inside the rear cavity.
The earbud is equipped with a soft-pack button battery, model: 1054PF3A, nominal voltage: 3.8V, from VDL. The side label information: 41mAh 0.1558Wh. The front label information: charging limit voltage – 4.35V.
Take out the speaker inside the front cavity.
The front of the speaker, featuring a titanium-plated composite diaphragm.
After measurement, the speaker diameter is approximately 10mm.
All components of the HUAWEI FreeBuds SE 3 true wireless earphones.
03/ Summary
The most significant upgrade of the HUAWEI FreeBuds SE 3 is in its appearance. While maintaining a lightweight and portable size, the charging case features a new metal color + faux leather texture design, offering a more fashionable and refined texture. The earbuds also feature metal-colored cover decorations, with a single weight of only 3.8g.
The charging case is equipped with a 510mAh lithium battery, using the iCM CM1125 series integrated MOSFET single-cell lithium battery protection IC – responsible for overcharge, over-discharge, and over-current protection. It uses the SinhMicro SS888AH Power MCU, responsible for charge/discharge management and overall control.
The earbuds are equipped with a 41mAh soft-pack button battery and a 10mm dynamic driver. The mainboard uses the WINSEMI WSDF2310 lithium battery protection IC – responsible for charge and discharge protection. It uses the WQ7031M bluetooth audio SoC for wireless connectivity and audio data processing. It is equipped with Sunlord SDCL0603Q series multilayer ceramic inductors. A MEMS microphone is installed for voice call pickup.
PS: Translated from 52audio
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