Keep is a well-known sports and fitness brand, which not only provides Keep App fitness app, but also has a series of professional fitness equipment and sports equipment, as well as a large number of exercise class services. Keep Smart Sports Band B4 is a very popular product under its umbrella, based on the intelligent linkage with Keep App, accurate monitoring of sports health and in-depth guidance and other functions, to help users improve their sports experience.
Keep smart sports bracelet B4 is equipped with a 1.58-inch AMOLED screen, PPI 326, providing clear color display, health monitoring, equipped with a 4-channel heart rate sensing element, dual blood oxygen lamp group, combined with the fourth-generation self-developed heart rate algorithm, to provide more accurate data detection, and also supports sleep quality monitoring, providing sleep breathing rate data.
In terms of sports and fitness, Keep smart sports bracelet B4 supports 42 sports modes, supports running, walking automatic recognition, skipping rope, squats, push-ups, jumping jacks, burpees, and curls 6 kinds of popular home sports automatic counting. Based on the exercise data collected by the bracelet, Keep App can provide professional exercise evaluation, including exercise status, training load, recovery degree, running ability, exercise performance, etc., to help users exercise more scientifically.
In terms of compatibility, Keep Smart Sports Band B4 supports Bluetooth 5.0 Android 9.0 or iOS 11.0 and above system phones, which can be used with most of the current users' mobile phones. In terms of battery life, the battery life can reach 14 days when fully charged, and it supports fast charging, charging for 5 minutes, and can be used for 2 hours. Let's take a look at the detailed teardown report of this product~
1. Keep smart sports bracelet B4 unboxing
The Keep Smart Sports Bracelet B4 packaging box uses the front display to display the product appearance, brand LOGO and product name.
The back of the box is labeled with a factory label, and it is designed with a Keep APP download QR code. Product Name: Keep Bracelet B4, Product Color: Night Running Black, Manufacturer: This product is authorized to be produced by Shenzhen Calorie Sports Technology Co., Ltd.
The picture and text on the side of the packaging box introduce the product features: 1.58-inch AMOLED full screen, 14-day ultra-long battery life, 4-channel heart rate and blood oxygen monitoring, 16000+ official course matching.
包装盒侧边设计有“DISCIPLINE SETS ME FREE”自律给我自由的产品Slogan。
The other side of the box is designed with "Self-discipline gives me freedom" Chinese Slogan.
The contents of the box include a bracelet, a charging cable, and a product manual.
The charging cable of the bracelet adopts a USB-A to magnetic dual-pin port.
The appearance of the Keep smart sports bracelet B4 at a glance adopts a square host with a silicone wristband design, which is light and slim, and comfortable to wear.
The inside of the bracelet has a glance, and the main unit and the wristband are connected by a lever-type disassembly structure, which can be easily disassembled and replaced.
Close-up of the front screen of the main unit, equipped with a 1.58-inch AMOLED screen, and the curved glass design is thinner and lighter.
Close-up of the back of the main unit, with a sensor module in the middle and a charging contact on the top.
The appearance of the right side of the host is at a glance, with a curved middle frame design, metallic texture, a multi-function button, and an orange stripe decoration in the middle.
A glance at the appearance on the left side of the console.
Close-up of the lever-type metal disassembly structure connected to the main unit and wristband.
According to the actual measurement of the Institute of Intelligent Research, the weight of the Keep smart sports bracelet B4 is about 25.7g, which is comfortable and light to wear.
The Institute used the CHARGERLAB POWER-Z KM001 Pro tester to conduct a charging test on the Keep smart sports bracelet B4, with an input power of about 0.95W.
2. Dismantling of Keep smart sports bracelet B4
Go to the disassembly section, slide the lever, and remove the wristband.
The overall appearance of the outside of the wristband is fixed with a card pin, and the wristband hoop is engraved with the "K" brand LOGO.
The inner side of the wristband is designed with a sweat channel to improve the breathability of the wear.
Close-up of the structure holding the wristband on the main unit.
Remove the cover on the back of the main unit.
An overview of the structure on the inside of the cover plate, with a small health monitoring sensor plate and a charging connector and magnet unit on top.
The internal structure of the cavity is at a glance, the motherboard is fixed by screws, and the battery is set under the motherboard.
Remove the health monitoring sensor plate.
A list of circuits on one side of the health monitoring sensor board.
An overview of the circuit on the other side of the health monitoring sensor board.
Close-up of the heart rate and blood oxygen monitoring sensor, including two sets of LED illuminated lights and a 4-channel light receiving sensor.
GOODiX Goodix GH3020 health monitoring IC is used for heart rate, blood oxygen and other health monitoring functions.
Close-up of the BTB connector male socket of the small board cable connection motherboard of the health monitoring sensor, from Acechi Technology (OCN), model: OK-128GM010/2-35.
Remove the motherboard and battery cell and remove the screen.
The structure of one side of the middle frame is at a glance, and the left side is provided with a function button module, and the cable is connected to the motherboard in copper.
A glance at the structure on the other side of the middle frame, with a Bluetooth antenna pasted on top.
Remove the function button module and fix the cable through the metal bracket.
A list of the buffer structure on the inside of the function buttons.
Close-up of the micro-motion button on the function button module.
A list of the circuits on the inside of the screen.
The screen cable is connected to the male BTB connector of the motherboard.
Silk screen G623 touch screen controller.
Separate the motherboard and battery cells.
A list of circuits on the motherboard side.
A list of circuits on the other side of the motherboard.
Close-up of the silk-screened +38A rotor vibration motor for real-time vibration feedback.
Close-up of the metal shrapnel connecting the cable of the function button.
Silkscreen printed YMC IC.
A metal shrapnel connected to a Bluetooth antenna.
Another metal shrapnel connected to a Bluetooth antenna.
BTB connector socket for connecting the cable of the small board of the health monitoring sensor, model: OK-128GF010/2-35, from Hatch Technology (OCN).
Ambiq Micro's Apollo3 Blue Plus (AMA3B) is an Arm Cortex-M4F® core MCU that integrates floating-point unit (FPU) and TurboSPOT™ technology, enabling a new level of energy savings for battery-powered devices, increasing the computing power of the Arm Cortex-M4F core while significantly reducing the actual operating power consumption (6uA/[email protected]). Mobile IoT devices and other more powerful mobile devices offer longer battery life.
Close-up of the 32.000MHz crystal oscillator, which provides the clock for the main control chip.
Silk screen 1E3 IC.
The crystal oscillator of the DA304C.
Silk screen A085 IC.
STMicroelectronics LSM6DSOWTR sensor, a 6-axis sensor with state machine support for motion acquisition.
丝印APM 238的IC。
A metal shrapnel that connects the charging connector on the inside of the back cover.
Another metal shrapnel connected to the charging connector.
The BTB connector socket that connects the screen cables.
丝印CHO L2A4的IC。
GigaDevice GD5F1GQ5REYIG memory IC chip with a capacity of 1Gb for storing firmware information.
SG SGM38045 MICRO is an inductor-free power management chip that provides AVDD (digital interface voltage), ELVDD (electroluminescent positive drive voltage) and ELVSS (electroluminescent negative drive voltage) for small AMOLED displays such as smart bracelets and smart watches. It can be powered by a single Li-Ion/polymer battery or a DC power supply ranging from 2.7V to 4.8V.
SGMICRO圣邦微SGM38045详细资料图。
Silkscreen printed YMC IC.
Shanghai Aiwei Electronics AW32001 lithium battery charging IC with power path management, the input withstand voltage is 28V, supports 2-500mA charging current, and the parameters can be set by the I²C interface.
According to the I love audio network, there are currently Meta, Huawei, Xiaomi, OPPO, vivo, Honor, Redmi, Lenovo, OnePlus, Meizu, LG, JBL, Nothing, HHOGene, Mammer, Oladance and many other well-known brands at home and abroad have adopted Aiwei Electronics' chip products.
Shanghai Aiwei Electronic AW32001ACSR detailed information map.
The built-in lithium battery model of the host: VDL 351529PM5, nominal voltage: 3.87V, rated capacity: 185mAh 0.71Wh, charging limit voltage: 4.45, from VDL Zijian Electronics.
Tear off insulation protection, a list of circuits on one side of the battery protection board.
A list of circuits on the other side of the battery protection board.
iCM CM1112-MAE 2-in-1 battery protection IC. The CM1112 series has a built-in high-precision voltage detection circuit and a delay circuit, which can detect the voltage and current of the battery to realize the protection of overcharge, over-discharge, and over-current of the battery. Protection circuits for single-cell Li-ion/Li-Polymer rechargeable batteries.
据智研所拆解了解到,,创芯微锂电保护IC目前已获得三星、ikko、OPPO、vivo、荣耀、iQOO、一加、漫步者、小天才、讯飞、Nothing、HYUNDAI、沃尔玛、usmile、realme、癙 �度小度、声阔、AUKEY、Skullcandy、realme、中兴、Jabra、QCY、魔声、bilibili、华为、荣耀、联想、名创优品、Haylou等品牌旗下的产品采用。
iCM Chuangxin Micro CM1112-MAE detailed data map.
Keep smart sports bracelet B4 disassembles the family photo.
3. I love the audio network summary
In terms of appearance, Keep smart sports bracelet B4 adopts the current mainstream large-screen design to provide richer real-time sports health monitoring data display. At the same time, the square main unit is very light and thin, with a silicone strap, which is comfortable and light to wear, and the lever-type quick-release structure design can easily change the strap and replace.
The internal battery capacity is 185mAh, which is from VDL and is equipped with iCM CM1112-MAE 2-in-1 battery protection IC for charge and discharge protection, and the small board is equipped with two sets of LED illuminators and 4-channel light receiving sensors, and the small board is equipped with GOODiX GH3020 health monitoring IC.
主板上，采用了Ambiq Micro公司的Apollo3 Blue Plus （AMA3B）处理器，GigoDevice兆易创新GD5F1GQ5REYIG存储IC，SGMICRO圣邦微SGM38045无电感电源管理芯片，以及上海艾为电子AW32001锂电池充电IC等。