As the new national standard GB 47372-2026 "Safety Technical Specification for Mobile Power Supplies" is implemented, UGREEN, one of the drafters of this standard, has proactively upgraded its entire mobile power supply product line.
Recently, UGREEN launched a new ultra-thin magnetic wireless charging power bank (Model PB574) compliant with the new national standard. It features a built-in high-quality ATL cell with a capacity of 5000mAh, successfully passing needle puncture, 140°C thermal box, 2.5-ton crush, 1.3x overcharge, and 800-cycle tests, and has obtained CCC certification under the new national standard.
This magnetic wireless charging power bank focuses on an ultra-thin portable experience, featuring an aluminum alloy metal bottom shell paired with a skin-friendly magnetic panel design. It supports 20W USB-C wired two-way fast charging and up to 15W magnetic wireless fast charging. It also fully complies with the intelligent traceability requirements of the new national standard, allowing users to connect via a USB-C cable to the smartphone app "UGREEN Smart Link" to check real-time battery health, cycle count, internal temperature, charge/discharge power, and the unique traceability code of the ATL cell.
Chongdiantou presents a detailed teardown of this product below to examine its internal design and components.
Product Unboxing
The front of the packaging features a minimalist white background design, with the UGREEN black logo printed in the top left corner and a prominent gold sticker indicating compliance with the new national standard for mobile power supplies in the top right corner.
The back of the packaging displays bilingual (Chinese and English) product specifications, safety warnings, manufacturer information, barcodes, and CCC certification marks.
A close-up of the product parameters on the back of the packaging; detailed explanations will be provided later when discussing the product.
Upon opening the package, the contents include the UGREEN magnetic wireless charging power bank itself, a USB-C to USB-C data cable, a gray velvet storage bag, an after-sales service policy card, a user manual, and a safety warning card for the power bank.
The back shell of the UGREEN magnetic wireless charging power bank is made of starlight silver aluminum alloy, featuring a finely sandblasted anodized surface. The corners and edges of the body are smoothly rounded.
Front view of the back side of the power bank, featuring a minimalist silver metal body with a centered dark gray UGREEN brand logo.
Front view of the power bank, with a lightning bolt icon printed in the center of the magnetic ring.
The middle frame on one side of the body displays dual QR codes for traceability, CCC certification marks, and other identifiers. On the far right, there is a circular power button flush with the metal frame, providing clear tactile feedback.
The bottom of the body features LED indicator lights, with a separate wireless charging status indicator light on the left.
The other side of the body contains detailed product nameplate parameters:
Product Name: Mobile Power Supply
Model: PB574
P/N: 85928
Cell Capacity: 5000mAh
Manufacturer: Dongguan Hailutong Industrial Co., Ltd.
SN: ARUNDDG91-DD08823471ATLD
Date of Manufacture: 2026.09.01
Recommended Safe Service Life: 5 Years
Made in China
Brand Owner: Shenzhen Ugreen Technology Co., Ltd.
This product has passed CCC certification.
When attached to an iPhone, the UGREEN magnetic wireless charging power bank does not obstruct the camera during daily use while charging.
From a bottom perspective, the power bank fits tightly against the phone's edge when attached, without extending beyond the phone's bottom edge.
Lifting the power bank by hand does not cause it to fall, demonstrating strong magnetic attraction.
The included USB-C to USB-C data cable features a white TPE jacket and is bundled with a white rubber band for storage.
The USB-C male connectors at both ends of the cable feature white integrated injection molding shells, with extended strain relief boots at the tails for bend protection.
Product Dimensions and Weight
Measured with a caliper, the length of the UGREEN magnetic wireless charging power bank body is 103.02mm.
The measured width of the power bank body is 71.01mm.
The measured thickness of the power bank is only 8.60mm.
Placed on an electronic scale, the total weight of the unit measures approximately 124.6g.
Compared to an adult male's palm, the body is compact and exquisite, easily held with one hand.
Measured with a tape measure, the length of the included USB-C data cable is approximately 52.5cm.
Fast Charging Protocol Test
Using the POWER-Z KM003C tester to read the USB-C port protocols shows support for QC3.0, FCP, SCP, PD3.0, DCP, SAM 2A, and Apple 2.4A charging protocols.
The PDO message indicates that the USB-C interface offers three fixed voltage profiles: 5.00V 3.00A, 9.00V 2.22A, and 12.00V 1.67A, supporting a maximum 20W PD fast charging output.
Using the included cable to connect the power bank's USB-C port to an iPhone for wired charging, the measured output voltage was 11.89V, current was 1.61A, and output power reached 19.20W, successfully negotiating the PD3.0 20W fast charging profile.
Reading Product Information
It is understood that this new product from UGREEN supports viewing product status information via both the "UGREEN Smart Link" smartphone app and a web-based computer interface.
After connecting an external data cable to the phone, the app intuitively displays data such as battery level, input/output power, temperature, and battery information, meeting the requirements of the 2026 new national standard for mobile power supplies.
In the battery information page, users can view detailed data including current battery health, series configuration, parallel configuration, and cycle count.
By further drilling down into the Cell 1 information sub-page, the app directly retrieves the underlying cell traceability archive, clearly displaying the cell brand as ATL and the model number as 506578B.
Product Teardown
Entering the teardown phase, prying open the clips along the shell seams allows separation of the aluminum alloy metal bottom shell from the white plastic front shell.
View of the inside of the aluminum alloy metal bottom shell, which has high-temperature tape applied for insulation.
Peeling back the insulation layer at one corner of the aluminum alloy bottom shell reveals a large area of black graphite thermal pad underneath.
Overview of the components inside the white plastic front shell, with the PCBA module at the top and the cell below.
The back of the cell is covered with a large area of black cushioning foam.
Close-up of the top PCBA board, where the nickel tabs for the cell's positive and negative terminals are securely spot-welded to the B+ and B- pads on the mainboard.
The two Litz wires of the wireless charging coil are soldered to the PCBA module, with round and full solder joints.
Unscrew the fixing screws to remove the PCBA and cell assembly from the plastic front shell.
Close-up of the wireless charging module inside the plastic front shell, surrounded by a metal magnetic ring.
Removing the black foam sticker on the coil surface reveals that the wireless charging coil is tightly wound with multiple strands of Litz wire.
Overview of the removed cell and PCBA module assembly, with the front of the cell covered by green Nomex paper.
Separate the pouch cell body from the PCBA board.
Close-up of the laser-printed markings on the cell surface. This cell is from ATL CATL, model 506578B, with a nominal voltage of 3.92V, rated capacity of 5000mAh, and rated energy of 19.6Wh.
Close-up of the orange FPC flexible ribbon cable, which acts as a touch sensing antenna working with the touch chip to detect phone attachment status.
Overview of the front side of the PCBA module, featuring the wireless charging main control chip, power bank SoC, etc.
Overview of the back side of the PCBA module, featuring the lithium battery protection chip, two lithium battery protection MOSFETs, and the wireless charging power stage, etc.
The wireless charging main control chip is from NuVolta Semiconductor, model NU17113. This is a highly integrated wireless charging transmitter main control SoC designed specifically for ultra-thin magnetic wireless charging power banks. It integrates a 32-bit MCU core, low-resistance full-bridge power MOSFETs, and their drivers, supporting 15W magnetic wireless fast charging.
It also includes built-in high-precision current/voltage sampling, Q-value detection, Foreign Object Detection (FOD), and comprehensive protection mechanisms against input over/under-voltage, over-current, and over-temperature. Packaged in QFN47, it significantly reduces the number of peripheral circuit components.
A passive crystal oscillator marked YL240.
Close-up of the wireless charging resonant capacitor.
The USB communication protocol chip is from Si Ji Hong Sheng, marked US6270.
Another passive crystal oscillator next to the wireless charging power stage.
The MOSFET for switching the wireless charging resonant capacitor is from CMS Microelectronics, model CMSH1050K. This is a 100V N-channel power MOS based on SGT split-gate trench technology. Using a PDFN3.0×3.0 miniaturized package, it has a typical on-resistance of 9.5mΩ and a maximum of 12mΩ at 10V gate drive, capable of carrying high currents within a very small footprint. It is suitable for applications such as DC/DC conversion with 48V input, synchronous rectification for PD3.1 EPR output, communication power supplies, power tools, motor drives, and Battery Management Systems (BMS).
The total gate charge Qg of the CMSH1050K has a typical value of 22.8nC, threshold voltage typically 1.8V, input capacitance 1405pF, output capacitance 429pF, and reverse transfer capacitance of only 17pF. In terms of heat dissipation, the junction-to-case thermal resistance is typically only 1.4°C/W, and the junction-to-ambient thermal resistance is 40°C/W, allowing continuous dissipation of 78W at a case temperature of 25°C.
Close-up of an analog switch marked 4227, used for switching between standard Type-C functions and USB communication functions.
The power bank SoC is also from NuVolta Semiconductor, model NU6801. This is a power management chip with charge/discharge capabilities and 3-port path management, suitable for applications like power banks, TWS charging cases, and lithium-ion battery chargers. In charging mode, the chip supports buck charging (Buck Charger) with a wide VBUS input range of 4.4V to 16V, covering trickle charging, Constant Current (CC) charging, Constant Voltage (CV) charging, and charge termination. Conversion efficiency reaches 95.5% at 9V/2A.
In discharge mode, the chip supports Reverse Boost output with a wide VBUS range of 4.4V to 19V, achieving 95% conversion efficiency at 9V/2A, and is compatible with PD3.1 PPS and Qi2.0 MPP TX requirements. Simultaneously, the chip integrates path control and power management for 3 VAC ports, supporting unidirectional/bidirectional N-MOS driving, Sink/Source input detection, and Kelvin Sense for monitoring small output currents.
The NU6801 integrates high-precision IBUS and IBAT current sampling functions, eliminating the need for external sense resistors for power management and fuel gauge applications. It provides multiple high-precision AMUX channels for the MCU to monitor IAC/IBUS/IBAT, VAC/VBUS/VBAT, and NTC1/NTC2 signals.
The chip internally integrates 2 NTC monitoring channels for battery JEITA control and USB/wireless coil temperature control, a 4.5V/5V LDO providing 50mA external power supply, programmable line drop and battery voltage drop compensation, a wide switching frequency range from 300kHz to 1.1MHz, and an ultra-low quiescent current of 25uA in sleep mode. Additionally, the chip features over-voltage, over-current, over-temperature protection, VIN_DPM, under-voltage protection, and VAC/VBAT short-circuit protection. While maintaining high performance, it significantly reduces the number of peripheral components and PCB area, using a 4mm×4mm QFN-30 package.
The VBUS switch MOSFET for the USB-C interface is from Semione, model PED30D12MT. The PED30D12MT is an N-channel enhancement-mode power MOSFET with a breakdown voltage of 30V, continuous current of 12A, using a DFN3x3-8L dual-MOS package.
Close-up of the boost alloy inductor, specified as 2.2μH.
A touch chip marked T281A.
The lithium battery protection chip is from CMS Microelectronics, model CM100E-HDCN. This chip is a protection IC for single-cell lithium-ion or lithium-polymer battery packs, incorporating voltage and current detection and delay circuits. Working with external charge/discharge MOSFETs, it cuts off the corresponding circuit during over-charge, over-discharge, discharge over-current, short-circuit, and charge over-current conditions. It uses a DFN1.8 × 1.4 mm, 6-pin package.
Its typical protection thresholds are: Over-charge 4.530V, Over-discharge 2.600V, Discharge Over-current Detection 30mV, Short-circuit Detection 90mV, Charge Over-current Detection −15mV. Each protection feature includes corresponding delays to reduce false triggers caused by transient conditions.
The chip also features charger and load detection, over-charge auto-recovery, and sleep functions. The over-discharge release voltage is 2.700V, and the discharge over-current state requires disconnecting the load to reset.
The fuel gauge is from Kiwi Instruments, model KP691030. The KP691030 is a single-cell lithium battery fuel gauge chip from Kiwi Instruments, targeting system-side or pack-side battery gauging solutions. The chip integrates a 32-bit Cortex-M0+ microcontroller and a high-precision 15-bit ADC. By connecting an external 1~10mΩ sense resistor, it accurately measures battery current. With a 2mΩ sense resistor, the current measurement error is ±10mA. Combined with a battery model, the SOC estimation error can be controlled within 3%, while also supporting State of Health (SOH) and cycle count output.
The chip operates at 2.5~5.5V, supports 1 internal and up to 3 external temperature monitoring points, and multi-point voltage sampling. It communicates with the host via a 400kHz I²C interface, outputs estimated time-to-full and time-to-empty, and includes Flash memory for storing cell parameters and supporting Lifetime full-lifecycle information recording. Data such as cycle count and historical voltage/current/temperature extremes are not lost after power-off. Regarding power consumption, the ACTIVE mode typical current is 18μA, and SHUTDOWN mode is only 2.9μA. It uses a DFN2.5×4-12 package.
The lithium battery protection MOSFETs are from Semione, model 8225HM. The PE8225HM is an N-channel enhancement-mode power MOSFET with a breakdown voltage of 20V, continuous current of 22A, and typical on-resistance of 2.4mΩ. It uses a DFN3x3-8L dual-MOS package.
The other lithium battery protection MOSFET is from CMS Microelectronics, model CMS3060K. The CMS3060K is a 30V N-channel power MOS using a PDFN3×3 miniaturized package. At 10V gate drive, the typical on-resistance is 3.5mΩ. With a continuous drain current of 60A and a pulse current capability of 240A, it can carry high currents in a small volume, making it suitable for synchronous rectification or load switching in products like chargers, car chargers, and power banks. It helps reduce conduction losses and heat generation, facilitating high-density miniaturization designs for the entire unit.
The total gate charge Qg of the CMS3060K is typically only 15nC, and the gate-drain charge Qgd is 3.6nC. Combined with an internal gate resistance of 2.3Ω, a turn-on delay of only 6.4ns, and a rise time of 3.3ns, switching loss control is excellent, offering significant advantages in high-frequency PWM scenarios.
An authentication chip from Ziguang Tongxin, model T91-206.
Close-up of an NTC thermistor with a resistance of 10KΩ, accuracy ±1%, and B-value 3435.
Close-up of the side power button.
Close-up of the USB-C female connector on the PCBA board.
All disassembly complete, here is a final group shot of all components.
Chongdiantou Summary
Finally, the Bill of Materials (BOM) is attached for easy reference.
UGREEN's 5000mAh new national standard magnetic wireless charging power bank continues the refined and sleek design language of UGREEN's ultra-thin magnetic family. Featuring a starlight silver aluminum alloy back shell paired with a skin-friendly magnetic panel, the measured body thickness is only 9.29mm and weight is only 124.6g. The product supports 20W USB-C wired two-way fast charging and 15W magnetic wireless fast charging. It is among the first to implement the GB 47372-2026 new national standard requirements, allowing users to connect via a USB-C cable to the "UGREEN Smart Link" smartphone app to intuitively check battery health, cycle count, real-time temperature rise, charge/discharge power, and the underlying cell traceability archive, ensuring greater peace of mind and transparency for daily use.
Through the teardown analysis by Chongdiantou, it was found that the internal structure is compact and well-organized. The cell consists of a single high-density pouch lithium-ion cell from ATL CATL, model 506578B, accompanied by an independent NTC thermistor and a graphite thermal pad inside the aluminum alloy bottom shell. The mainboard uses the NuVolta NU6801 highly integrated bidirectional synchronous buck-boost SoC for 20W wired fast charging management, paired with the NuVolta NU17113 wireless charging transmitter main control SoC and an encryption authentication chip to achieve 15W magnetic wireless fast charging. The overall component selection is solid, with sufficient safety redundancy.
Prior to this, Chongdiantou has already torn down several UGREEN new national standard power banks. Interested readers can click the links below to view them.