Teardown experience: Do you know the insides of Bluetooth earphones?

Do you understand the inside of a Bluetooth earphone? Do you want to know how to put it together and take it apart? You can find the answer here.

QCY's TWS earphone products focus on the entry-level market and have won a good reputation by virtue of their high-cost performance advantages, with a very high sales volume in the global market. After experiencing the double action iron and ring iron sound units of T10 and T11 products, it returned to the hundred-yuan gear again on the latest T13.

The QCY T13 real wireless earphone has some changes in the overall appearance design. The charging case adopts a flat square design with rounded corners, and the back curve of the handled in-ear earphone has also been adjusted to add a large radian curve. The overall design is still very simple.

Configuration, the use of a 7.2mm moving coil unit, Bluetooth 5.1 chip, support AAC/SBC codec, support free switching, fastback connection; Supports binaural 4-mic call noise reduction, providing clear calls. Support fast charging, the single battery life of the earphone is 8 hours, and the overall battery life of the charging case is 40 hours; With the touch operation, an anti-touch sleep mode is added in the APP, and the touch function is turned off after it is enabled.

Without further ado, let's get right to the point. Let's take a look at the exterior design and internal structure of this product ~

First, the QCY T13 real wireless headset is unpacked

QCY T13 has made a new design on the packaging box this time. The brand LOGO adopts a new "QCY image", and the gray background "image" shading decoration. Image is QCY to chip as the inspiration of the brand Chinese name, to create a love of music, love rhythm of the elephant.

The display information includes the product name of the T13 True Wireless Bluetooth headset, Bluetooth 5.1, 7.2mm moving-coil speaker, and 40h long total battery life. And the slogan "Be Creative Go Beyond".

On the back of the box are some of the product's functional parameters and company information. Includes product name: QCY - 13, communication distance: 10 meters, charging time about 2 hours, music time: about 8 hours, the input parameters: 5 v ? 400 ma, support agreement: HFP/A2DP/AVRCP, manufacturer: dongguan hele electronics co., LTD.

QCY brand LOGO decoration on the side of the box.

The contents of the box include earphones, charging cables, two earplugs and product instructions.

Close-up of USB-A to Type-C charging cable.

Two close-ups of silicone earplugs in different sizes.

The charging box adopts the overall shape similar to "rice cooker", and the body is very smooth and round. There are grooves on the front for easy opening and a charging box indicator.

The top of the charging box is designed with the new brand LOGO of "QCY".

The Type-C charging interface is located on the right side of the charging box, and is not centered on the left.

Open the cover of the charging case, and the headphones lie flat in the charging case cabin.

Charging information input power: the lid 5 v ? 400 ma, models: In2026, capacity: 380 mah / 1.406 Wh, made in China, manufacturer: Dongguan hele electronics co., LTD.

Overview of the QCY T13 Real wireless headset overall appearance.

Charging case - metal contact that charges headphones.

Function keys for pairing connections.

The overall appearance of the headset is shown. An indicator light is set on the back, which is also the microphone opening.

Close-up of charging contacts on the inside of the ear handle.

At the bottom is a microphone for voice calls.

The inside of the earphone head is designed with L/R representation, which is convenient for users to pick up and put on.

A circular pressure relief hole covered by an internal air filter.

The earphone outlet is close-up and covered with a fine air filter to prevent foreign bodies from entering the sound cavity.

The output pipe is equipped with a large tuning hole, which is also protected by a fine air filter.

Measured, the overall weight of QCY T13 wireless headset is about 49.2g.

Each headset weighs about 4.4g, which is relatively light compared to the pair.

ChargerLAB POWER-Z KT001 portable POWER tester performs wired charging test on QCY T13 real wireless earphone, and the charging power is about 0.79W (the charging case is nearly full).

Second, QCY T13 real wireless headset dismantling

Disassemble the charging case

Pry open the charging box cabin where the clasp holds.

The main components inside the cabin of the charging box are shown. The motherboard is fixed by screws.

Remove the screws and remove the motherboard and battery unit.

The battery is soldered directly to the motherboard through nickel sheets.

Circuit at the back of the motherboard.

The battery and motherboard are fixed by double-sided tape.

Close-up of Type-C charging interface, through-hole welding.

Lithium-ion soft pack battery model HJ901828, voltage 3.7V, capacity 380mAh/1.046Wh, delivery date May 6, 2021, from Hongjie New Energy.

Two different colored LED indicators on the motherboard.

The pogo pin for charging headphones in the charging case.

TPS Siyuan SY8815 Bluetooth headset charging bin solution. Internal integrated charging module and discharge module. The charging current can be adjusted externally; The discharge module integrates two output current limiting switches, provides independent load presence detection and load insertion detection, and supports output current detection.

An unlabeled MCU.

Functional key for Bluetooth pairing connection.

Silk Screen 5332A is the lithium electric protection IC XB5332A of Suzhou Syson Electronic Technology. It has the functions of overcharge, overdischarge, short circuit, overcurrent and so on. It is used for battery protection of charging box.

The earphone and dismantling

Pry open the headphone along the closing wire to reveal a steel-case buckle battery, which is rare in entry-level TWS headphones.

The speaker is fixed to the outlet pipe by glue.

Take out the battery, and solder the speaker and battery wires to the mainboard.

The rear of the speaker is close-up, and a tuning hole is arranged in the middle, which is covered by an air filter.

Close-up of the front of the speaker, protected by a metal case.

Measured, the speaker size is about 7.2mm, consistent with the official propaganda.

Pry open the backboard of the ear handle.

The inside of the backplane is fixed with a touch detection sensor and a Bluetooth antenna, which are connected to the motherboard through metal contacts. On one side is a microphone cover, which helps the microphone pick up sound and prevents light leakage of the indicator.

The internal structure of the cavity is shown. The main board is fixed by cavity hot melting and glue.

Take out the battery, mainboard and speaker unit in the earphone.

The inner structure of the ear handle is shown. The microphone opening at the bottom is equipped with sealing foam to improve the sound picking performance. Next to it is a magnet for the headphone to attach to the charging case.

An overview of the main components inside the headset, including the speaker, battery, and motherboard.

Board front circuit at a glance.

Front close-up of steel shell buckle battery, Model ICB1240E4, voltage 3.7V, from EVE Lithium Energy.

Close-up of the back of the battery, 45mAh/0.167Wh.

Radium carved 11502 MEMS silicon wheat, used for voice call pick up.

JL Jerry AD6976D8 Bluetooth audio SoC, support Bluetooth 5.1, support AAC, SBC codec. Built-in 32-bit DSP, processor operating frequency up to 160MHz, support noise suppression and echo cancellation, support multi-band equalizer. Support single/dual microphone noise reduction, in this product adopts the dual wheat noise reduction scheme and the dual wheat ENC noise reduction algorithm developed by Jerry. Support two analog microphone amplification, built-in microphone bias. Built-in dual touch function.

Silk screen 1D1D lithium battery protection IC.

A pogo pin connected to a touch sensor on the motherboard.

Bluetooth master peripheral power inductor.

The pogo pin that charges the headphones.

The 24.000MHZ crystal oscillator provides the clock for the Bluetooth chip.

Screen printing HH01K 2113 touch IC.

Radium carved 11503 silicon wheat, used for call noise reduction function.

The motherboard of the right ear uses Bluetooth color discrimination and has the same configuration as that of the left ear.

QCY T13 true wireless headset unpack family photo.

Conclusion: QCY T13 Real wireless earphones adopt a new design in appearance, and the texture is also improved. The charging case is rounded and square, and the earphone is a handle in the ear design. The overall body is smooth and round, which makes it comfortable and stable to wear.

The internal structure is relatively simple, the battery in the charging box is directly welded on the motherboard, the battery capacity is 380mAh, the motherboard is equipped with Cycore electronic lithium electric protection IC, used for overcharge, overdischarge, short circuit, overcurrent and other protection functions; Siyuan SY8815 Bluetooth headset charging compartment solution, internal integrated charging module and discharge module, integrated charging overvoltage protection and discharge overcurrent, short circuit, overvoltage and overtemperature protection; And a standard - free MCU for power management, power indicator and other charging box control functions.

The headphone, speaker and battery are welded directly to the motherboard via wires. The most surprising is a 45mAh steel shell snap battery, which provides a single battery life of 8 hours. On the motherboard, the main control chip adopts Jay's Bluetooth audio SoC, which supports Bluetooth 5.1 and single/dual mic call noise reduction. It is equipped with two MEMS silicon microphones to achieve clear call effect.