On March 31 of this year, the mandatory national standard for power banks, GB 47372-2026, was officially released. This marks the full entry of power bank products into the era of 3C certification, where products that have not passed certification are prohibited from being manufactured or sold. As one of the core drafting units for this standard, Xiaomi was among the first to complete the switch of its Jinshajiang magnetic power bank product line to the new national standard.
Chongdiantou previously tore down the predecessor of this product—the Xiaomi Jinshajiang 10000mAh 45W Ultra-Thin Magnetic Power Bank (Model WPB1025S). The unit received this time is the iterative version that has completed the new national standard certification, model WPB1026S, which features targeted adjustments in both packaging and internal components.
This power bank continues with an integrated aluminum alloy body and magnetic wireless charging design. The body thickness is controlled at approximately 13.2mm, with a weight of about 195g. It is equipped with a USB-C bidirectional fast charging interface, supporting 45W wired output and 20W wireless fast charging. It is compatible with Xiaomi Surge Fast Charge as well as mainstream fast charging protocols such as PD3.2/PPS. It also supports querying the power bank's health status via Xiaomi's official webpage, meeting the requirements of the new national standard.
Appearance of Xiaomi Jinshajiang 10000mAh 45W New National Standard Ultra-Thin Magnetic Power Bank
The power bank comes in a white paper box, with the front featuring a product rendering and the text "Xiaomi Jinshajiang Power Bank Ultra-Thin Magnetic 10000 45W." A new national standard label is printed in the upper right corner.
The back of the box displays concentrated product information. The manufacturer is listed as Xiaomi Communications Co., Ltd., and a product barcode label is attached at the bottom, indicating the color is Dark Gray.
Close-up of the specifications on the packaging; detailed parameters will be introduced later when discussing the product nameplate.
It can be confirmed from the packaging level that this is a new national standard product that has passed 3C certification.
The package contains the power bank itself, a short dual USB-C braided cable, and a manual. No charger is included.
The power bank shell uses a dark gray color scheme with a finely sandblasted surface. The four corners feature large-radius chamfer transitions, resulting in an overall rounded design that feels comfortable in the hand without causing discomfort.
The Xiaomi logo is presented on the matte surface, matching the body's color tone. It is understated and does not stand out, nor does it easily collect fingerprints during daily use.
The center of the back features a ring marking for the magnetic wireless charging area. Product parameters and certification information are concentrated at the bottom. The overall design language remains consistent with the older model.
Close-up of the product nameplate:
Xiaomi Jinshajiang Power Bank Ultra-Thin Magnetic 10000 45W
Product Name: Power Bank
Model: WPB1026S
Rated Capacity: 5V 5.8Ah, 9V 3.2Ah, 11V 2.5Ah, 12V 2.3Ah, 15V 1.8Ah, 20V 1.3Ah
Battery Type: Lithium-ion Battery
Rated Energy: 36.77Wh (7.58V 4850mAh)
Input Parameters: USB-C (IN): 5V3A 9V3A 12V2.5A
Output Parameters: USB-C (OUT): 5V3A 9V3A 11V4.1A 12V3A 15V3A 20V2.25A
Wireless Output: 5W / 7.5W / 15W / 20W
Simultaneous Wired and Wireless Output: 15W
Suggested Safe Service Life: 5 Years
Manufacturer: Xiaomi Communications Co., Ltd.
Production Plant: Dongguan AoHai Technology Co., Ltd.
Origin: Made in China
This product has passed 3C certification.
Oblique view of the entire unit. The dark gray color combined with large-radius rounded corners gives a steady appearance.
Overview of the bottom interface panel. From right to left, there is a power button, a USB-C bidirectional fast charging interface, and four battery level indicator lights.
Close-up of the four LED battery level indicator lights.
Close-up of the USB-C female socket and power button.
A wireless charging status indicator light is located on one side. When wireless charging is active, the indicator light turns white to provide notification.
Overview of the body sides. The integrated aluminum alloy undergoes CNC machining, resulting in uniform chamfers.
Attaching the power bank to the back of an iPhone 18 Pro, the combined thickness is not excessive, and the appearance is neat.
In the attached state, wired charging to the phone is also possible using the included short cable.
The included short cable features a black braided exterior with USB-C connectors on both ends. The cable is extremely short, primarily used for recharging the power bank itself or for wired fast charging between the power bank and a phone, making it convenient to store together with the power bank in a pocket.
Close-up of the USB-C terminal on the included short cable.
Product Dimensions and Weight
Measured with calipers, the length of the power bank body is approximately 102.05mm.
The measured width of the body is approximately 70.56mm.
The measured thickness of the body is approximately 13.21mm, compared to the officially stated ~13.2mm. Maintaining this thickness with a 10000mAh capacity places it in the lightweight category among similar magnetic products.
Weighed on an electronic scale, the total weight of the unit is approximately 195.4g.
The measured length of the included short cable is approximately 13.5cm. It is short enough not to be cumbersome, suitable for carrying and storing alongside the power bank.
As shown in the image placed in an adult male's palm, the size is comparable to a bank card and can be held with one hand.
Fast Charging Protocol Test
Using a POWER-Z KM003C tester to read the USB-C port protocol shows support for QC3.0, FCP, SCP, AFC, PD3.2, PPS, QC4+, DCP, Apple 2.4A, and other fast charging protocols.
PDO messages indicate that the product supports five fixed voltage levels: 5V3A, 9V3A, 12V3A, 15V3A, and 20V2.25A, as well as a 5-11V 4.1A PPS level and a Xiaomi Surge Fast Charge 9-20V 3.0A/2.25A level. The wired output specification is 45W.
Using this power bank to charge an iPhone 18 Pro via data cable, the POWER-Z KM003C displays a current voltage of 15.08V, current of 2.98A, and power of 44.86W, which is consistent with the 45W labeled on the product.
Reading the eMarker information of the short cable reveals that the cable internally integrates an HP9610B eMarker chip, utilizing a ZMI solution. It supports 20V5A power transmission, ensuring that the 45W full-power wired output does not drop speed.
Product Smart Interaction
By connecting the power bank to a computer via a data cable and logging into the Xiaomi official query page, detailed product information can be read, including remaining battery level, battery health, and cycle count. This meets the new national standard requirement for product status queryability.
After successfully connecting to the power bank, basic product information and battery information are intuitively visible. It can be seen that two-cell series architecture is used internally, allowing direct viewing of single-cell voltage and temperature.
Close-up of the cell detailed status on the query page.
Product Teardown
Formally entering the teardown phase, prying open the back cover and separating one of the cells reveals the internal battery pack and PCBA module. The battery pack consists of two cells.
Overview of the inner side of the shell. Buffer foam is set at the top to protect the PCBA and reduce the risk of damage from drops. Metal clips are distributed around the perimeter for shell fixation.
Looking at the other shell piece, it includes a small PCBA board and cells.
The cells are from ATL (Amperex Technology Limited), model ATL 436678B. Single cell capacity is 4850mAh, nominal voltage is 3.79V, and energy is 18.39Wh. The cell body is printed with the CCC mark.
The internal PCBA is divided into two small boards, top and bottom, connected by a flexible ribbon cable on the left side.
Continuing to separate the two small boards reveals the magnetic wireless charging module under the panel.
The layout of one of the small boards is shown in the figure, revealing the USB-C female socket, inductor, and foam pad, etc.
Close-up of the other bottom small board, showing a graphene heat dissipation sticker applied.
After removing the surface heat dissipation sticker, the exterior of the product shell is displayed.
It can be seen that the bottom small board contains the wireless charging main controller, inductor, battery protection IC, etc.
Further separating the wireless charging coil from the shell.
Close-up of the wireless charging module. Visible is the shielding FPC that isolates electromagnetic interference generated during wireless charging operation.
Close-up of the touch sensing FPC.
Continuing separation, it is visible that the wireless charging coil and PCBA board are connected by wires.
Separating the coil reveals an NTC thermistor on the surface.
Close-up of the NTC thermistor.
The single cell is from ATL (Amperex Technology Limited), with a single cell capacity of 4850mAh and energy of 18.39Wh. Nominal voltage is 3.79V.
Having examined the cells, we now look at the top PCBA small board. Components such as the protocol chip, buck-boost switches, VBUS switches, LED beads, thermistors, and USB-C female socket are distributed across it.
The back of the top PCBA small board distributes components such as the buck-boost chip and buck-boost switches.
The main control chip on the top small board is from Chipsea Technologies, model CPW3261. The CPW3261 is a USB Type-C and USB PD controller suitable for applications such as power banks, BMS, wireless charging, and monitors.
This chip integrates all functions of Type-C CC and USB PD, as well as USB BC1.2. Simultaneously, it integrates multiple smartphone fast charging protocols to enhance charging compatibility for terminal devices.
The chip series internally integrates a 32-bit microprocessor with an operating frequency of48MHz, capable of supporting a wide range of industrial control applications and scenarios requiring high-performance CPUs.
Embedded 128KB program Flash, 24KB SRAM, and various peripherals (such as I/O ports, timers, USART, I2C, ADC, watchdog, etc.) enable the CPW3261 series to be used in broader applications.
Close-up of a chip marked with "51R4".
Two VBUS switches are from Prisemi, model PPM8PN02R8. They are PMOS transistors with a breakdown voltage of -20V and an on-resistance of 5.6mΩ, packaged in PDFN3333-8L.
Two synchronous buck-boost switches are from Prisemi, model PSM8PN03R4. They are NMOS transistors with a breakdown voltage of 30V and an on-resistance of 4.3mΩ, packaged in PDFN3333-8L.
The other two synchronous buck-boost switches are also from Prisemi, model PSM8PN03R4.
Close-up of a synchronous buck-boost inductor.
A component marked with "7001".
Close-up of the LED shading cover.
Now looking at the bottom small board, close-up of the front. The front of the bottom PCBA module distributes components such as low-voltage solid-state filter capacitors, wireless charging chips, and buck-boost chips.
Close-up of the back of the bottom small board. The back distributes wireless charging power transistors and authentication chips.
A low-voltage solid-state filter capacitor with specifications of 25V 100μF.
The wireless charging transmitter chip is from CPS Semiconductor, model WB8128. This is a highly integrated 30W Qi wireless power transmitter main control chip supporting Qi2.2, MPP, and Samsung fast charging protocols, with an input voltage range of 3.3V to 24V.
The chip internally integrates a 32-bit MCU, 32KB MTP storage, PWM driver, and FSK PHY modulation/demodulation, enabling efficient control of the wireless transmitter coil to achieve stable power output.
The chip provides 2× I²C master/slave, 2× UART, and multiple GPIOs. It features a built-in 16-channel 12-bit ADC capable of collecting voltage, current, and temperature signals. It also includes safety mechanisms such as FOD (Foreign Object Detection) and over-voltage/over-current/over-temperature protection.
The WB8128 adopts QFN31 packaging, supports a wide operating temperature range of -40~105°C, and meets RoHS and halogen-free requirements. It is a high-integration, high-reliability solution for mid-to-high power wireless charging designs.
A crystal oscillator used to generate clock signals for the wireless charging chip.
The authentication chip is the CPS1010 from CPS Semiconductor, a wireless charging protocol encryption chip designed for Qi certified applications.
This chip integrates a SHA256 encryption engine, ECC signatures, and true random number key generation capabilities, providing identity authentication and security certification support for wireless charging devices. It adopts DFN8 packaging.
The datasheet for the CPS1010 from CPS Semiconductor is shown above.
The wireless charging power transistor is from JST, marked with silkscreen JST25GN01.
The touch chip is HYNITRON HK51BS, adopting SOT23-6 packaging.
The synchronous buck-boost converter is from Southchip, model SC8723. It is a synchronous buck-boost converter integrating four switches. It provides high power efficiency and stable voltage regulation regardless of whether the output voltage is higher, lower, or equal to the input voltage.
The SC8723 supports a very wide input and output voltage range. The input voltage range reaches 2.7V to 22V, and the output voltage range reaches 3V to 22V, supporting up to 3.5A output current.
The SC8723 adopts average current mode control. The output voltage is regulated by resistors on the FB pin. Both the chip operating mode (PSM/FPWM) and switching frequency can be adjusted via external settings.
The chip also provides programmable output current limits, flexibly supporting different applications.
The SC8723 supports internal current limiting, input undervoltage protection, output overvoltage protection, output short-circuit protection, FB short-circuit protection, and over-temperature protection, ensuring safety under various abnormal conditions. The SC8723 adopts QFN22 packaging.
The battery protection chip is marked with silkscreen "5s1aCL".
The battery protection MOSFET is marked with silkscreen "2002," used for overcharge, over-discharge, and overcurrent protection of the built-in lithium batteries.
Chongdiantou Summary
Finally, the bill of materials for the product is attached for reference.
Xiaomi's new national standard version of the 10000mAh ultra-thin magnetic power bank balances 45W wired and 20W wireless fast charging. With a body thickness of approximately 13.21mm and a weight of about 195.4g, it remains lightweight and portable among similar magnetic products.
The teardown shows that the interior uses a two-cell series architecture with ATL (Amperex Technology Limited) cells. Each cell has a capacity of 4850mAh and energy of 18.39Wh. The cell bodies are printed with the CCC mark, complying with the mandatory certification requirements of the new national standard.
The top small board integrates the Chipsea Technologies CPW3261 protocol main controller, paired with Prisemi VBUS and buck-boost switches. The bottom small board integrates the CPS Semiconductor WB8128 wireless charging main controller and CPS1010 authentication chip, powered by the Southchip SC8723. Four JST25GN01 power transistors form a full-bridge drive for the transmitter coil. Combined with the Hynitron touch chip and two independent NTC temperature measurements, it achieves stable 20W wireless fast charging.
It is understood that compared to the older model, the changes in the new national standard version are mainly at the certification level, with the new product having already passed the 2026 new national standard certification. In Chongdiantou's view, this product completes the upgrade to the new national standard while maintaining the lightweight design and material quality, making it a safe choice.