Relying on its great success in the mobile phone accessories market at home and abroad, Anker’s performance has maintained rapid growth and successfully listed in China this year, becoming the first independently listed company in cross-border e-commerce. And Anker officially registered the Soundcore audio brand in China this year, and is fully committed to the bluetooth audio market.
What 52audio will teardown today is the Anker Soundcore Life Dot 2 true wireless earphones. This product is mainly for overseas markets. It features a 100-hour long battery life. The charging case uses a large-capacity battery, and the single battery life of the earphones can reach 8 Hours, it also supports fast charging; Anker Soundcore Life Dot 2 earphones adopt bean-type in-ear design, earphones are designed with replaceable earwings and eartips, IPX5 waterproof, suitable for sports wear; for more information about this product, let’s take a look at the details. Disassemble it!
The Anker products previously teardown by 52audio include: Soundcore Liberty 2 Pro, Soundcore Liberty Air 2 and Soundcore Spirit Pro, etc.
| 1. Anker Soundcore Life Dot 2 charging case teardown
After unpacking the box, we have a comprehensive understanding of the appearance of the Anker Soundcore Life Dot 2 true wireless bluetooth earphones. The built-in 2600mAh high-capacity battery brings longer battery life to the earphones, and the internal space should be relatively compact. Next, we will enter the dismantling process to look at the internal structure and power management chip information.
Pry open the case, the battery wire and FPC are relatively short.
The internal structure of the charging case is displayed, and the battery and the shell are filled and fixed with glue.
Take out the cylindrical lithium battery and use a lot of white glue to fix the bottom.
The USB Type-C interface is connected to the motherboard through the FPC.
A metal baffle is used to fix the interface position.
The charging case is fixed on the inside of the charging cockpit with two screws.
Inside the charging cockpit shell, there are two circular magnets on the left and right earphone positions, which are used to magnetically fix the earphones; there is a bar magnet at the opening of the box cover to attract the box cover, and on it is the light guide of the indicator light.
Charging case internal circuit.
Charging case The other side of the internal circuit.
Motherboard circuit.
On the other side of the motherboard circuit, there are the solder joints of the battery wires and the connector of the charging interface FPC.
LPS LP5301QVF, 36V overvoltage and overcurrent dual protection chip. The addition of this high-voltage IC can effectively avoid the high-voltage shock charging case circuit caused by the misoperation of the charger, and can effectively improve the safety and stability of the product.
LowPowerSemi LP5301QVF detailed information.
MMBT3904 NPN transistor.
MMBT3906 PNP transistor.
Silkscreen MK3E IC.
Sinhmicro SS215X is an integrated 5V synchronous buck-boost module, including charge and discharge management, power path management, high-precision ADC and rich interface SoC, suitable for all kinds of smart hardware devices or accessories that require charge and discharge management through the USB port. High integration, high flexibility, and streamlined peripheral devices effectively reduce the development difficulty, PCB area and BOM cost of the overall solution.
It is understood that Sinhmicro’s solutions are widely used in a variety of TWS earphones charging cases including 1MORE, Edifier, ZMI, FIIL, Lenovo, Astrotec, Nubia and other brands.
Xysemi XB6366D lithium battery integrated protection IC, used for built-in lithium battery protection.
Xysemi XB6366D detailed information.
MicroOne’s boost IC boosts the battery output to charge the earphones.
18650 batteries, from CHAM, model PA79, rated voltage 3.7V, rated capacity 2600mAh/9.62Wh.
The solder joints of the positive and negative leads of the battery are full.
The battery information is consistent with the label, 3.7V 2600mAh.
Pogo Pin for charging earphones.
Two RGB LED indicators.
| 2. Anker Soundcore Life Dot 2 earphone teardown
Continue to disassemble the earphone part of Anker Soundcore Life Dot 2. The earphone is a bean-type in-ear design, equipped with earwings to improve the stability of wearing.
The earphone is controlled by a physical button, and the shell at the press is matte texture, which increases friction to facilitate pressing, and there is a Soundcore brand logo on it.
The position of the indicator light and the call microphone pickup hole.
After the earwing is removed, a pressure relief hole on the inside of the earphone has a groove to ensure pressure relief.
Two charging contacts and a magnet in the middle.
The tuning hole near the mouthpiece.
The metal dust-proof net at the mouthpiece prevents foreign objects from entering.
Disassemble the earphone shell along the parting line.
The internal structure of the earphones.
Inside the earphone shell.
Take out the physical structure of the button and fix it with glue.
The outer side of the button structure is a circle of bluetooth antenna, and the inner side has metal contacts.
The light guide structure of the indicator light is also a protective cover for the call microphone.
The inside of the earphones is a “hamburger” structure, the outside is the main board, and the positive and negative electrodes of the battery are directly welded on the main board.
Solder the positive and negative solder joints of the battery.
The speaker unit and the charging contacts are connected to the main board through the FPC.
Take out the battery and fixing bracket.
There is “R4” on the outside of the battery holder.
Inside the battery holder.
The size of the battery and the coin are compared.
There is a QR code label under the insulating tape.
The 1454 button battery comes from VDL Group, with a diameter of 14mm, a thickness of 5.4mm, a rated capacity of 0.32Wh, and a rated voltage of 3.7V.
According to 52audio, well-known brands such as Huawei, Xiaomi, Meizu, and OPPO have adopted VDL group batteries.
The size comparison of the earphones motherboard and the coin.
Circuit outside the motherboard.
Anker Soundcore Life Dot 2 true wireless bluetooth earphones uses Realtek RTL8763B bluetooth audio SoC, supports bluetooth 5.0, built-in 32-bit ARM processor, 24-bit DSP, operating frequency up to 160MHz, built-in 8Mbits Flash memory, reducing PCB area.
Realtek RTL8763B has built-in lithium battery charging management, overvoltage, overcurrent, undervoltage protection and other battery protection devices. In terms of scalability, it supports three LED drivers, touch IC control, analog and digital microphone input, and supports dual microphones with binaural call function. In terms of noise reduction, it supports noise reduction function and ambient sound monitoring mode. It is an all-round TWS true wireless bluetooth earphones integrated solution.
According to 52audio, brands such as Amazon, Anker, FIIL, JLab, Xiaomi, Redmi, QCY, Toshiba, etc. have adopted a large number of Realtek TWS earphones solutions.
Laser carving MB4L HL23’s MEMS silicon microphone is used for call pickup.
Connect the Pogo Pin of the bluetooth antenna.
Two LED indicators are surrounded by foam to prevent light leakage.
Jog button. Use glue to reinforce the FPC solder joints.
The integrated lithium battery protection chip of the silk screen 0813, there is a TVS under the right button to prevent electrostatic breakdown from damaging the motherboard components.
Inside the sound cavity. The FPC is connected to the contact point for charging the earphone and the speaker unit, and the charging contact point is fixed on the shell by glue.
The positive and negative solder joints of the speaker unit.
The size of the speaker unit is about 8mm, consistent with the publicity.
All components of Soundcore Life Dot 2 true wireless bluetooth earphones.
|3. Summary
The Anker Soundcore Life Dot 2 true wireless bluetooth earphones has a simple appearance, and the earphones and charging case are designed with a bright surface and a matte contrast. The charging case has a built-in 2600mAh high-capacity battery, which makes the earphones have a comprehensive battery life of up to 100 hours, and the weight is well controlled; the earphones is a bean-type in-ear design, equipped with replaceable earwings to improve wearing stability, and the earphones supports IPX5 waterproof , There is also a long battery life of 8 hours, which is more suitable for people who like sports and value the battery life of headphones.
In terms of internal circuits, the charging case inputs power through the USB Type-C interface. LPS LP5301QVF supports up to 36V over-voltage and over-current dual protection. Sinhmicro SS215X MCU integrates a 5V synchronous buck-boost module, responsible for battery charge and discharge management, rich interfaces, and control The whole machine; the charging case adopts CHAM’s 18650 battery cell with a capacity of 2600mAh, which provides a longer battery life for the earphones.
The main control chip of Anker Soundcore Life Dot 2 earphones is Realtek RTL8763B, supports bluetooth 5.0, built-in lithium battery charging management, battery protection device, supports LED drive, touch IC control, analog and digital microphone input, etc., with strong scalability and high integration , The peripheral circuit is streamlined; the earphone uses FPC antenna to transmit signal, micro-button control, single MEMS silicon microphone for call, 1454 button type soft pack battery from VDL Group, capacity 0.32Wh, dynamic speaker unit size is about 8mm. The long battery life of the earphones is outstanding and the target user is clear.
Source: 52audio
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2 Comments
Amazing breakdown! Thank you for this. Had a question. I love these earbuds but don’t love the case. I was thinking of have a “minimal” case 3-D printed for these so they are more pocketable. The clear issue with that is the size of the battery. Is it possible to connect a different, smaller battery to this board? And if so, do you have any recommendations on which size battery to get? This is an early stage idea so I have no schematics made for the minimal case, just in a fact-finding phase right now. Thank you!
How did you open the charger case?