Xiaomi recently launched a new series of 67W power banks with built-in cables and digital displays, available in 10000mAh and 20000mAh versions. The 20000mAh model (Model PB2067) features a built-in USB-C cable and an additional 1A1C interface. It supports 65W input and 67W output bidirectional PD fast charging, including Xiaomi’s 67W Surge fast charging protocol, making it suitable for quickly powering Xiaomi phones and lightweight laptops.
Product Features:
- ••Design: PC flame-retardant shell with a light blue matte finish and rounded edges. The built-in cable (about 24cm long) can also function as a carrying strap. An LED digital screen displays the remaining power.
- ••Interfaces & Parameters:
- ••Input (Built-in USB-C/USB-C port): 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/3.25A.
- ••Output: 67W MAX multi-port output.
- ••Built-in USB-C/USB-C port: 5V/3A, 9V/3A, 11V/6.1A, 12V/3A, 15V/3A, 20V/3.35A, plus PPS profiles.
- ••USB-A port: 5V/3A, 9V/2.23A, 10V/2.25A, 12V/1.67A.
- ••Battery: Contains three EVE ICR786588BS 6700mAh Li-polymer cells (total 20000mAh). Rated capacity: 12000mAh (5V/3A); rated energy: 74.37Wh. Certified by CCC.
- ••Size & Weight: 140.13mm × 72.2mm × 31.03mm; net weight approximately 416g.
Internal Teardown Highlights:
- ••Key Components:
- ••Synchronous buck-boost controller: Southchip SC8815A.
- ••Protocol chip & MCU: CHIPSEA CPW3220.
- ••Battery protection IC: iCM CM1332-UAT.
- ••LED display driver: TM TM1646.
- ••MOSFETs: Willsemi WNM03301D (for power conversion) and others (marked 3033A, for VBUS switching).
- ••Build Quality: PCB includes thermal pads, graphite sheets for heat dissipation, and protective plastic frame with foam for the battery cells. Critical components are reinforced with adhesive, and a thermistor monitors temperature.
This power bank combines high capacity, fast charging, and portability, with robust internal construction suitable for travel.
Xiaomi 67W Power Bank with Built-in Cable & Digital Display Unboxing
The front of the packaging box prints the Xiaomi brand logo, product name, image, and the 2000 identifier in the lower left corner.
The back prints the product parameters and merchant information.
The front of the body is designed with the text “67W MAX”.
The back of the body is printed with product parameter information.
The measured length of the power bank body is 140.13mm.
The width is 72.2mm.
The thickness is 31.03mm.
The measured length of the built-in USB-C cable is about 24cm.
An intuitive feel of the size of the power bank in hand.
Additionally, the measured net weight of the power bank is about 416g.
Performance & Testing
The built-in USB-C cable output is measured to support PD3.0, PPS, QC5, DCP charging protocols.
The PDO messages show it also has five fixed voltage levels: 5V3A, 9V3A, 12V3A, 15V3A, 20V3.35A, and two PPS voltage levels: 5-11V6.1A, 5-20V3.35A. It also supports Xiaomi’s 67W Surge Charge.
The USB-C port is measured to support QC3.0, PD3.0, PPS, QC5, DCP, Apple 2.4A charging protocols.
The PDO messages show the USB-C port also has the same five fixed voltage levels: 5V3A, 9V3A, 12V3A, 15V3A, 20V3.35A, and two PPS voltage levels: 5-11V6.1A, 5-20V3.35A. Furthermore, it also supports Xiaomi’s 67W Surge Charge.
Finally, the USB-A port is measured to support QC3.0, DCP, Apple 2.4A charging protocols.
Using the power bank’s built-in USB-C cable to charge a Xiaomi 17 Pro Max successfully activates Xiaomi’s 67W Surge Charge.
When the charging power climbed to a stable state, the measured power was 52.19W.
Internal Teardown & Components
Xiaomi 67W Power Bank with Built-in Cable & Digital Display Teardown
The body shell is opened. The inner side of the shell has a graphite thermal paste attached and is filled with adhesive to help dissipate heat from the battery cell.
After tearing off the graphite thermal paste, a plastic plate is seen covering the PCB. Both the battery cell and the plastic plate are filled with adhesive material.
After tearing off the graphite thermal paste, a plastic plate is seen covering the PCB. Both the battery cell and the plastic plate are filled with adhesive material.
Removing the plastic plate reveals a thermal conductive pad on the inner side corresponding to the inductor area on the PCB board.
The battery cell is connected to the PCB board via spot-welded nickel strips. The digital display on the side is connected via a plug-in ribbon cable.
The soldered connection points of the built-in USB-C cable core are protected with adhesive.
The battery cell and PCB board are taken out and separated. The battery cell is protected by a plastic frame.
The plastic frame has foam padding attached inside to protect the battery cell.
The internal battery pack of the power bank consists of three stacked polymer lithium batteries.
The three battery cells are from EVE Energy, model 786588BS. Rated voltage 3.7V, single cell rated capacity 6700mAh, rated energy 24.79Wh, typical capacity 6800mAh, typical energy 25.16Wh, charge limit voltage 4.35V. They have passed national CCC compulsory certification and CE certification.
The front of the PCB board has synchronous buck-boost switching tubes, a buck-boost inductor, VBUS switching tubes, and filter solid capacitors. The inductor and capacitors are reinforced with adhesive.
The other side features a lithium battery protection IC, lithium battery protection MOSFET, synchronous buck-boost controller, protocol chip, and MCU. A thermistor is also soldered on to monitor the battery cell temperature.
The lithium battery protection chip is from PowerMind (创芯微), model CM1332-UAT. This is a protection chip dedicated to 3-series Li/Fe/Na batteries, with built-in high-precision voltage detection and current detection circuits. By detecting the voltage, charge/discharge current, and temperature of each cell, it enables functions like overcharge protection, over-discharge protection, balancing, wire break detection, discharge overcurrent protection, short circuit protection, charge overcurrent protection, and over-temperature protection. The discharge overcurrent protection delay is adjustable via an external capacitor; other protection delays are built-in.
The filter solid capacitor is from Toshin (东佳), specification 25V 100μF.
The synchronous buck-boost controller is from Southchip (南芯科技), model SC8815A. It is a high-efficiency bidirectional synchronous buck-boost controller supporting 1-6 cell battery charging and a 36V operating voltage. The chip supports complete lithium battery charging management, where parameters like battery charging current and voltage, reverse discharge output voltage, and input/output current limits can all be controlled via the I2C bus.
The SC8815A has a built-in 10-bit ADC, provides charging status indication, supports automatic adapter insertion and load insertion detection, and features under-voltage protection, over-voltage protection, over-current protection, short circuit protection, and thermal shutdown protection. The chip uses a QFN32 package and is suitable for PD fast charging power banks, USB-C hubs, and industrial power applications.
Information about Southchip SC8815A.
The buck-boost inductor is reinforced with adhesive. Four synchronous buck-boost switching tubes are placed on both sides, all with the same part number.
The synchronous buck-boost switching tubes use Will Semiconductor (韦尔) WNM03301D, NMOS, rated voltage 30V, on-resistance 4.3mΩ, using PDFN3.3*3.3-8L package.
Chipsea (芯海科技) CPW3220 series are USB Type-C and USB PD controllers suitable for bidirectional battery applications. They integrate two independent Type-C CC and USB PD functions, Load Switch Driver, and USB BC1.2. They also integrate fast charging protocols for various mobile phones to enhance charging compatibility with end devices. They can be used in power banks, power tools, and other fields, easily achieving a dual Type-C port solution with a single chip.
Five MOSFETs printed with 3033A serve as the VBUS switching tubes for the built-in USB-C cable and the 1A1C interface output.
A regulated chip printed with SWDTE.
Tianwei (天微) TM1646 is used for screen display driving.
Close-up of the thermistor.
The power button is soldered as a SMD component.
Close-up of the USB-C interface.
Close-up of the USB-A port, soldered using a sunken board and through-hole design.
Close-up of the digital display screen.
A look at all the disassembled parts, with a family photo.
Summary
Finally, attached is the core component list of the Xiaomi 67W Power Bank with Built-in Cable & Digital Display for your convenience.
The Xiaomi 67W Power Bank with Built-in Cable & Digital Display comes in two colors, coffee and light blue, with an overall minimalist design. The product features an LED digital display that accurately shows the remaining power at any time. It has a built-in 24cm long USB-C cable for plug-and-play convenience, which can also be used as a carrying strap, enhancing portability. The 20,000mAh large capacity combined with 67W fast charging is sufficient to meet users’ needs for battery life and performance.
The product internally uses three polymer lithium battery cells from EVE Energy, which have passed national 3C compulsory certification. Additionally, it is protected by a PowerMind CM1332-UAT lithium battery protection solution, with temperature monitoring via a thermistor. A Chipsea CPW3220 MCU paired with a Southchip SC8815A power management solution controls the fast charging for each interface. The battery cells and PCB board have reinforcement protection and auxiliary heat dissipation. The workmanship is reliable.
