Introduction

UGREEN has released a 20,000mAh power bank. While maintaining the brand's signature design, it now features an integrated USB-C cable. It comes equipped with one USB-A and one USB-C port, supporting 67W PD fast charging, Xiaomi 67W, and 33W UFCS protocols. The large 20,000mAh capacity ensures extended battery life. Next, let’s take it apart to examine its internal components and structure.

Product Appearance

The front of the packaging features the UGREEN logo, product name, appearance, and selling points.

The back displays the spec info.

The packaging contains the power bank, cable, and some documents.

The included cable is a dual USB-C type and is branded with the UGREEN logo.

The length of the dual USB-C cable is about 52.5 cm (20.67 inches).

ChargerLAB POWER-Z KM003C shows that the cable contains an E-Marker chip, supports power delivery up to 50V/5A, and offers USB 2.0 data transfer capabilities.

It adds a built-in braided USB-C cable.

The top side is printed with "UGREEN" and "67W 20000mAh Power Bank."

The side features a power button and a digital display.

The button is made of metal, and the display shows the remaining battery level.

It is equipped with one USB-A port, one USB-C port, and a built-in USB-C cable.

The other side of the device has a cable storage slot.

The built-in USB-C cable can also be used as a carrying strap.

The connector is marked with "67W" and "IN 2/OUT 3" labels.

The back is printed with the spec info.

Model: PB550

USB-C/USB-C cable input: 5V3A, 9V3A, 12V3A, 15V3A, 20V3.25A, max 65W

USB-C/USB-C cable output: 10V2.25A, 5V3A, 9V3A, 12V3A, 15V3A, 20V3.35A, max 67W

USB-A output: 10V2.25A, 5V3A, 9V2A, 12V1.5A

Total output: 5V6A, 9V5.22A, 10V4.5A, 12V4.67A, 15V3A, 20V3.35A

Lithium-ion battery rated energy: 72Wh (14.4V 5000mAh)

Total cell capacity: 20,000mAh

Rated capacity: 11,520mAh (TYP 5V 6A)

Manufacturer: Shenzhen UGREEN Technology Co., Ltd.

The length of the power bank is about 139.11 mm (5.48 inches).

The width is about 80.42 mm (3.17 inches).

The thickness is about 26.92 mm (1.06 inches). 

The length of the built-in cable is about 18 cm (7.087 inches).

That's how big it is in the hand.

The weight is about 394 g (13.9 oz).

ChargerLAB POWER-Z KM003C shows that the USB-C cable supports FCP, SCP, AFC, QC3.0, PD3.0, DCP charging protocols, as well as Xiaomi's 67W proprietary fast charging protocol.

And it has five fixed PDOs of 5V3A, 9V3A, 12V3A, 15V3A, and 20V3.35A, as well as two Xiaomi proprietary voltage ranges: 3.6–11V at 6.1A and 3.6–20V at 3.25A.

ChargerLAB POWER-Z KM003C shows that the USB-C port supports FCP, SCP, QC3.0, PD3.0, DCP charging protocols, as well as Xiaomi’s 67W proprietary fast charging protocol.

The PDO report shows the same results as the USB-C cable.

The USB-A port supports UFCS, FCP, SCP, AFC, QC3.0, DCP, and Apple 2.4A charging protocol.

Teardown

Next, let's take it apart to see its internal components and structure.

The cover is opened along the seam. The shell is made of PC+ABS flame-retardant material and includes foam padding to protect the battery cells.

The other part of the casing houses the PCBA module and a battery pack composed of four 21700 cells.

The PCBA module features a dual-layer design. The lower PCB is secured with screws, and the battery pack is connected to the upper PCB via nickel strip spot welding.

The battery voltage sensing wires are soldered to the battery cells using nickel strips and insulated with high-temperature resistant tape. There is also a thermistor for temperature monitoring, which is secured with adhesive glue.

The battery pack and PCBA module are removed, revealing that the other half of the casing features a plastic plate to secure the battery pack.

A magnet is embedded on the side to hold the USB-C built-in cable connector, and a layer of Barley paper is applied.

The solder joints of the USB-C built-in cable wires and the connector pins between the two PCBs are reinforced and protected with adhesive glue.

The bottom of the battery pack is fitted with a protective pad, and Barley paper is applied around the edges.

The battery pack consists of four identical 21700 lithium-ion cells, all with the same part number.

The cells are model INR21700-5000 from SunPower, with a nominal voltage of 3.6V, a nominal capacity of 5000mAh, and an energy rating of 18Wh. The charge cutoff voltage is 4.2V, and the cells are CCC and CE certified.

The front side of the upper PCB features a lithium battery protection chip and a MOSFET for battery protection. A cell balancing circuit is located in the upper-right corner.

The back has pin header slots on both sides.

The battery protection IC is the CM1341-FKT from iCM, a dedicated protection chip for 4-cell lithium-ion or LiFePO₄ battery packs. It integrates high-precision voltage and current detection circuits.

By monitoring the voltage of each cell, charge/discharge current, and temperature, the chip provides protection functions such as overcharge, overdischarge, cell balancing, open-circuit detection, low-voltage charge inhibition, discharge overcurrent, short circuit, charge overcurrent, and overtemperature protection. The discharge overcurrent protection delay is adjustable via an external capacitor, while other protection delays are internally set.

The lithium battery protection MOSFET is from AGMsemi, model AGM308AP. It is an N-channel MOSFET with a voltage rating of 30V and an on-resistance of 6.2mΩ. It uses a PDFN 3.3×3.3 package.

Close-up of the cell balancing circuit.

The front of another PCB features buck-boost inductors, solid capacitors, a thermistor, a digital display, a power button, and other components. The capacitors and inductors are secured with adhesive.

The back side features two SoCs, synchronous buck-boost MOSFETs, and VBUS MOSFETs.

The solid capacitors on the battery side are from Koshin, each rated at 25V 100μF.

The master control chip for the power bank is from Injoinic, model IP5385. It is the first fast-charging power bank SOC integrating the UFCS protocol, supporting QC2.0/QC3.0/SCP/UFCS output fast charging protocols, AFC/FCP input/output fast charging protocols, TYPE-C PD2.0/TYPE-C PD3.0 input/output protocols, TYPE-C PD3.0 PPS output protocol, compatible with BC1.2 Apple phones, synchronous bidirectional buck-boost converter, lithium battery charging management, battery level indication, and other multifunctional power management features, providing a complete power solution for fast-charging power banks.

The IP5385 can simultaneously support two USB-A ports, three USB-C ports, and one Lightning port. Any single port can support fast charging independently, while using two or more output ports simultaneously only supports 5V input/output. Thanks to the high integration and rich features of the IP5385, only minimal external components are needed in applications—just one inductor to achieve bidirectional buck-boost functionality, effectively reducing the overall solution size and BOM cost.

The IP5385 supports 2 to 4 series-connected battery cells. Its synchronous switching buck-boost system can provide up to 65W input and output power, and it automatically enters sleep mode under light load conditions.

The four paired synchronous buck-boost MOSFETs are all AGMsemi AGM404AP1, NMOS, with a voltage rating of 40V and an on-resistance of 4.4mΩ, housed in a PDFN 3.3×3.3 package.

Close-up of the other two AGMsemi AGM404AP1 synchronous buck-boost MOSFETs.

Another power bank SOC also uses the Injoinic IP5385.

The four paired synchronous buck-boost MOSFETs paired with it also use AGMsemi AGM404AP1.

The two buck-boost inductors are reinforced with adhesive at the center and insulated with heat-shrink tubing.

The solid capacitor at the USB-C cable end is from Koshin, rated at 25V 100μF.

The USB-C built-in cable features an E-Marker chip marked with 332D, model HUSB332D. It is the latest USB Type-C eMarker chip from Hynetek, supporting USB Type-C Specification 2.2, USB Power Delivery Specification 3.1, USB4 2.0, and Thunderbolt 3 and 4 standards. It also supports USB PD 3.1 Extended Power Range (EPR). The HUSB332D has been certified by the USB-IF association with TID number: 9125.

Here is the information about Hynetek HUSB332D.

The solid capacitor at the USB-C connector end is also from Koshin, with the same specification of 25V 100μF.

The 8 VBUS MOSFETs have the same part number.

All VBUS MOSFETs are AGMsemi AGM308AP.

Close-up of the thermistor.

Close-up of the power button.

Close-up of the USB-C socket.

Close-up of the USB-A socket.

The digital display is protected by a plastic casing.

Well, those are all components of the UGREEN 67W 20000mAh Power Bank.

Summary of ChargerLAB

Here is the component list of the UGREEN 67W 20000mAh Power Bank for your convenience.

Both the USB-C cable and USB-C port support 65W PD fast charging input as well as 67W PD and Xiaomi 67W output. The bidirectional fast charging, whether for charging itself or charging other devices, is very fast. Additionally, the built-in cable features a braided design, making it more wear-resistant and durable, which reflects UGREEN’s attention to quality.

After taking it apart, we found that it contains four built-in SunPower INR21700-5000 battery cells. It uses the iCM CM1341-FKT lithium battery protection solution, with a balancing circuit and thermistor for protection and temperature monitoring. Two Injoinic IP5385 SOCs are used to manage fast charging control at the ports. The MOSFETs selected are AGMsemi AGM308AP and AGM404AP1. Koshin capacitors are used for filtering, components are reinforced with adhesive, and the battery cells are insulated and cushioned for protection.

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