Introduction
UGREEN has released a 20,000mAh power bank with a built-in cable, offering fast charging and large capacity to easily meet the power needs of multiple devices. Certified by CCC, it ensures safety and reliability. In addition to the built-in USB-C cable, the power bank features one USB-A and one USB-C port, allowing simultaneous charging of up to three devices. Both the built-in USB-C cable and the USB-C port support 20W PD, and the device is compatible with PD, QC, SCP, as well as Huawei’s 22.5W proprietary fast charging protocol. Let’s take a closer look at its design and components.
Product Appearance
The front of the packaging features the UGREEN logo, product name, appearance image, selling points, and the CCC certification mark.
The back of the packaging displays the specifications, safety precautions, and vendor information.
The package includes the power bank, a charging cable, and some documentation.
The included charging cable is a USB-A to USB-C type.
The length of the included charging cable is about 54 cm (21.26 inches).
The top features a built-in USB-C cable. The casing is made of flame-retardant PC material with a matte finish, showcasing a minimalist design.
The UGREEN logo is printed at the bottom front.
At the top, there is a hidden battery indicator for convenient monitoring of the remaining power.
In addition to the built-in USB-C cable, the top also features one USB-A port and one USB-C port.
The built-in USB-C cable is made of silicone and supports 20W input and 22.5W output.
There is a power button located on the side.
The opposite side displays the specifications.
Model: PB505
USB-C (IN1) Input: 5V 3A, 9V 2.22A, 12V 1.67A
USB-C Cable (IN2) Input: 5V 3A, 9V 2.22A, 12V 1.67A
USB-C (OUT1) Output: 10V 2.25A, 5V 3A, 9V 2.22A, 12V 1.67A
USB-C Cable (OUT2) Output: 10V 2.25A, 5V 3A, 9V 2.22A, 12V 1.67A
USB-A (OUT3) Output: 10V 2.25A, 5V 3A, 9V 2A, 12V 1.5A
Total Output: 5V 3A Max
Polymer lithium-ion battery rated energy: 74Wh (3.7V 20000mAh)
Cell capacity: 20000mAh
Rated capacity: 12500mAh (TYP 5V 3A)
Certified by CCC, with the serial number SN: DE9D142A1001A1146.
The length of the power bank is about 116.22 mm (4.58 inches).
The width is about 70.55 mm (2.78 inches).
The thickness is about 30.03 mm (1.18 inches).
The length of the built-in USB-C cable is about 13 cm (5.12 inches).
That's how big it is in the hand.
The weight is about 338 g (11.92 oz).
ChargerLAB POWER-Z KM003C shows that the built-in USB-C cable supports QC3.0, FCP, SCP, AFC, PD3.0, DCP, and Apple 2.4A charging protocols.
And it has three fixed PDOs of 5V3A, 9V2.22A, and 12V1.67A.
The USB-C port supports the same charging protocols as the built-in USB-C cable.
The PDO reports are also identical.
The USB-A port supports QC3.0, FCP, SCP, AFC, DCP, and Apple 2.4A charging protocols.
Teardown
Next, let's take it apart to see its internal components and structure.
Open the front casing. The edges are secured with snap-fit clips.
The PCB is secured with screws. The wires between the digital display and the battery pack’s front-end PCB are sealed with adhesive for protection.
Remove the battery pack. Sponge and foam pads are attached to the front, back, and bottom of the cells, respectively.
Remove the PCB. The built-in USB-C cable is secured by a plastic housing and tightened with screws.
Separate the PCB and the built-in USB-C cable.
Remove the plastic casing. A small PCB is secured at the bottom with screws.
The front-end PCB of the battery pack has its nickel strip welding area covered with insulating paper, with positive and negative wires on both ends.
The two battery cells are spot-welded to the PCB with nickel strips.
Separate the two battery cells from the PCB. The printed codes indicate that both cells are identical.
The battery cells are from EVE, model 126280GS, with a rated voltage of 3.7V, capacity of 10Ah, and energy of 37Wh. They have a charge cut-off voltage of 4.4V and are certified by CCC and CE.
There are no components on the other side of the PCB.
The front side of the main PCB features the master control chip, an inductor, VBUS MOSFETs, a thermistor, and the digital display.
The back side is equipped with a battery protection chip, a battery protection MOSFET, and an MCU.
The battery protection chip uses the Hycon HY2116 series IC, which features a built-in high-precision voltage detection circuit and delay circuit, supporting overcharge, over-discharge, and overcurrent protection.
Close-up of the battery protection MOSFET marked with "2002."
The master control chip is from iSmartWare, model SW6236. It is a multi-protocol power bank SoC with four ports (A+A+C+C). It integrates a 5A high-efficiency switching charger and a built-in 22.5W high-efficiency synchronous boost output with an efficiency up to 95.73%. Additionally, it features a very low standby power consumption of less than 40μA at 3.7V. The chip supports fast charging on any of the four ports, with the two USB-C ports supporting bidirectional input and output. It is compatible with multiple fast charging protocols, including PPS, PD, SCP, FCP, QC, AFC, PE, and BC1.2, meeting the fast charging needs of most devices on the market.
The iSmartWare SW6236 supports 3.6V/3.65V lithium iron phosphate batteries and 4.2V/4.3V/4.35V/4.4V/4.5V ternary lithium batteries. It features an I²C interface to configure charging current, output voltage, and output current limits. The chip also supports intelligent insertion detection, low current mode, and wireless charging mode, with the wireless charging mode supporting simultaneous fast charging and discharging.
It features a built-in coulomb counter for precise battery measurement and a 12-bit ADC for high-resolution analog-to-digital conversion. It supports 3 to 5 LED battery indicators, as well as an 188 fast-charging indicator digital tube and a wireless charging icon digital tube, enabling users to easily monitor the device’s performance and status. Additionally, it offers multiple protection functions, including OVP, OCP, UVP, OTP, CTP, and NTC temperature monitoring, ensuring reliable operation.
The paired 2.2μH alloy inductor is reinforced with adhesive for stability.
The thermistor is used for monitoring the battery cell temperature.
The Chipsea CSU32M10 series is an 8-bit CMOS single-chip RISC MCU with a built-in 12-bit ADC. It features 2K × 16-bit MTP program memory and 104 bytes of SRAM. The series is available in MSOP10, SOP16, and QFN16 packages.
The three VBUS MOSFETs are Ruichips RU8205A models.
Well, those are all components of the UGREEN 22.5W 20000mAh Power Bank with Built-in Cable.
Summary of ChargerLAB
Here is the component list of the UGREEN 22.5W 20000mAh Power Bank with Built-in Cable for your convenience.
The built-in USB-C cable design offers convenience for users. Both USB-C ports support PD 20W, and all three ports are compatible with Huawei's SCP 22.5W proprietary protocol, as well as other fast charging protocols like QC and PD. With a 20,000mAh capacity, it ensures long-lasting power for extended usage.
After taking it apart, we found that the battery pack consists of two cells from EVE, and it uses the Hycon HY2116 lithium battery protection solution to implement overcurrent, overcharge, and over-power protection. It is equipped with a thermistor for temperature monitoring. It also incorporates the iSmartWare SW6236 highly integrated power bank SoC solution to enable multi-port fast charging. Components like the inductor are reinforced with adhesive for protection, and the battery cells have insulation and cushioning designs for enhanced safety and reliability. The craftsmanship is solid.
