Vidda, a brand under Hisense, has launched the C1 140W 20000mAh super power bank with a built-in cable. This product features a starry gray sandblasted aluminum alloy shell, offering a highly professional and business-oriented appearance.
The body includes a braided USB-C fast charging cable that can serve as a lanyard handle when stored, balancing portability and practicality. In terms of capacity, the product contains four 5000mAh cells, totaling 20000mAh, which complies with civil aviation carry-on standards and has passed the latest new national standard safety certification for power banks.
The Vidda C1 super power bank is equipped with a built-in USB-C cable, a USB-C port, and a USB-A port. Both USB-C ports support 70W high-speed self-charging and up to 100W output. The total simultaneous multi-port output reaches 140W, easily enabling full-speed fast charging for two devices such as a laptop and a smartphone at the same time.
Additionally, the front of the unit features a 1.14-inch TFT color interactive screen, supporting real-time display of remaining battery level, per-port power/voltage/current, battery health, cycle count, and cell temperature. It also allows viewing individual cell voltage and records of abnormal temperature or voltage.
Product Appearance
The front of the packaging box adopts a minimalist white background design, featuring the brand model, rendering of the exterior, and key selling points.
The back of the packaging box lists detailed product specifications.
Upon opening the package, it contains the Vidda C1 super power bank itself and the user guide.
The middle frame of the Vidda C1 super power bank body uses a one-piece formed aluminum alloy material in a starry gray color, treated with fine sandblasting and anodizing for a warm hand feel and scratch resistance.
The rear design is simple and flat, with detailed specification parameters laser-engraved on the lower half.
Rear parameter close-up:
Product Name: Portable Power Bank Model: 78VP5S
Rated Energy: 77.6Wh (Built-in four 3.88V 5000mAh cells)
Rated Capacity: 12000mAh (5V 3A)
Input: IN1 / IN2: 5V 3A, 9V 3A, 12V 3A, 15V 3A, 20V 3.5A
Output: OUT1 / OUT2: 5V 3A, 9V 3A, 12V 3A, 15V 3A, 20V 5A
OUT3: 5V 3A, 9V 2A, 12V 1.5A, 10V 2.25A
OUT1 + OUT2: 100W Max + 40W Max
OUT1 / OUT2 + OUT3: 100W Max + 22.5W Max
OUT1 + OUT2 + OUT3: 100W Max + 20W Max (OUT2 & OUT3 shared)
Manufacturer: Hisense Visual Technology Co., Ltd.
Production Plant: Dongguan Tekway Technology Co., Ltd.
The product has passed CCC certification.
Querying the CCC certificate confirms the product complies with GB 31241-2022, GB 47372-2026, and GB 4943.1-2022 standards.
The bottom shell of the power bank features laser-engraved production date codes and SN serial numbers.
The top output panel of the body is configured with USB-A, USB-C fast charging ports, and a power button.
The exit point for the built-in cable is located on the left side of the body, reinforced with a protective sleeve at the root. The cable body uses high-density gray nylon braided material, resistant to pulling and wear.
The built-in USB-C fast charging cable features a one-piece molded storage clip. Once the connector is inserted into the clip and locked, it transforms into a carrying lanyard, facilitating portability.
Product Dimensions and Weight
Using a tape measure, the length of the built-in USB-C fast charging cable was measured at approximately 21.5cm.
Using calipers, the length of the power bank body was measured at 121.13mm.
The width of the power bank body was measured at 72.47mm.
The thickness of the power bank body was measured at 27.27mm.
Using an electronic scale, the total weight of the power bank was measured at approximately 416.4g.
The intuitive feel of holding the power bank in hand is shown below.
Testing with the POWER-Z KM003C showed that the built-in USB-C cable supports QC3.0, FCP, SCP, AFC, PD3.0/PPS, QC5, DCP, and Apple 2.4A fast charging protocols.
PDO messages indicate that the built-in USB-C cable offers five fixed voltage profiles: 5V 3A, 9V 3A, 12V 3A, 15V 3A, and 20V 5A, along with one PPS fast charging profile of 5.00-21.00V 5.00A.
Testing confirmed that the USB-C port also supports QC3.0, FCP, SCP, AFC, PD3.0/PPS, QC5, DCP, and Apple 2.4A fast charging protocols, consistent with the built-in cable.
PDO messages show that the USB-C port similarly provides five fixed voltage profiles: 5V 3A, 9V 3A, 12V 3A, 15V 3A, and 20V 5A, along with one PPS voltage profile of 5.00-21.00V 5.00A.
Testing showed that the USB-A port supports QC3.0, FCP, SCP, AFC, DCP, and other charging protocols.
Charging an iPhone 18 Pro Max via the built-in USB-C cable resulted in an output voltage of approximately 14.89V, current of approximately 2.96A, and output power reaching 44.14W.
Product Smart Interaction
The power bank features a 1.14-inch TFT color display screen. A single click on the power button wakes the screen. The default main interface displays the current remaining battery percentage, status prompts, and a dedicated IP character image.
Clicking the power button once on the main interface switches to the page displaying real-time current and voltage for each port.
Clicking the power button again switches to the battery status page, where the screen displays current battery health, real-time cell temperature, and battery cycle count. Long-pressing for 5 seconds on this page enters/exits detailed settings.
Long-pressing the function key for 5 seconds on the battery status page enters the secondary menu for more information and settings. The first view is the screen timeout duration setting page, supporting free switching between four levels.
Switching to the cell voltage page, the screen directly displays the code for each of the four series-connected cells, the total battery pack voltage, individual cell voltage, and cell model.
Continuing to click the power button switches to the software version page, showing the current firmware version number as 1.0.0.8.
Continuing to click switches to the temperature anomaly history record page, which can record and query the time and frequency of temperature anomalies.
Clicking again switches to the voltage anomaly history record page, which can record and query voltage anomaly logs.
When an external device is in fast charge/discharge state, the main interface displays the current battery level, active ports, and real-time output power.
In discharge mode, switching to the current/voltage page highlights the OUT1 port and monitors output voltage and current in real time.
Having briefly reviewed the product appearance and tests, we now proceed to the formal teardown section.
Product Teardown
Entering the teardown phase, the plastic inner frame containing the battery pack and PCBA module is extracted entirely from the outer shell.
A view of the front of the inner frame shows the upper part consists of the main control board and screen driver board stacked in two layers, with components largely covered by gray-white thermal adhesive for reinforcement and heat dissipation. The lower part contains a 4-series lithium-ion soft-pack battery group, protected by black foam pads attached to its surface.
The PCBA module and battery pack are separated and removed from the inner frame.
An independent lithium battery protection board is located at the front end of the battery pack, insulated externally by green Nomex paper.
Peeling off the insulating Nomex paper reveals the front of the small protection board, which houses the lithium battery protection chip, protection MOSFETs, and a communication socket to the main control board.
Separating the small protection board from the battery pack, the four soft-pack cells are stacked and connected in series. Thick black double-sided adhesive foam is placed between every two cells for cushioning and isolation.
The cells inside the product come from HPT (Haopeng), model 506578AFU, with a nominal voltage of 3.88V, nominal capacity of 5000mAh, and rated energy of 19.4Wh. Four cells in series form a 15.52V 5000mAh 77.6Wh battery pack.
A close-up of the front of the battery protection small board shows the nickel tab solder joints, lithium battery protection chip, protection MOSFETs, current sampling resistor, and two NTC thermistors.
A close-up of the back of the battery protection board.
Moving to the main control PCBA module, it utilizes a design with two small boards stacked vertically. The surface of the upper main control board is extensively covered with glue, effectively improving internal heat dissipation and shock resistance.
The upper and lower PCB boards are connected via pin headers on both sides.
Cleaning the thermal adhesive from the surface of the main control board and separating the two small boards, the left one is the main control board, the middle one is the screen driver board, and beside them is the communication flex cable connecting to the battery protection board.
A view of the front of the main control board shows the power button and protocol chip in the top-left corner, a magnetic ring inductor and three solid-state filter capacitors in the center, a buck-boost chip and alloy inductor in the bottom-right corner, and USB-C female sockets, the built-in cable slot, and a USB-A female socket arranged sequentially at the top.
A view of the back of the main control board shows another bidirectional synchronous buck-boost controller, two sets of buck-boost switch transistors, VBUS switches, etc.
This power bank adopts a dual-channel independent bidirectional synchronous buck-boost circuit architecture, respectively handling the charge/discharge conversion for the built-in USB-C cable and the USB-C + USB-A ports, thereby achieving independent dual-channel fast charging outputs of 100W + 40W.
A view of the back of the screen driver small board shows components such as the MCU and NOR Flash.
The front of the screen driver small board features a display screen.
The built-in lithium battery protection analog front-end chip comes from INJOINIC, model IP3561Q. It is a highly integrated BMS analog front-end AFE chip designed specifically for 2~4 cell lithium or lithium polymer battery packs, using a QFN32 package.
The chip integrates a 16-bit voltage Δ-Σ ADC and a 16-bit high-precision current Δ-Σ ADC, supporting high-precision synchronous acquisition of individual cell voltages, total pack voltage, 4-channel NTC external temperatures, and chip junction temperature.
Paired with a sampling resistor, it enables bidirectional charge/discharge current detection up to ±50A, transmitting precise voltage, current, and temperature data in real-time to the main control MCU via standard/fast I2C interfaces, providing reliable data support for fuel gauging calculations and battery status monitoring.
The IP3561Q integrates comprehensive and independent hardware-level protection logic covering overcharge, over-discharge, multi-stage discharge over-current, short-circuit, charge over-current, high/low temperature, and disconnection protection, while directly integrating high-side NMOS drivers and passive balancing switches.
Additionally, the chip integrates an external power supply capable 3.3V/25mA LDO, a 32-bit real-time clock counter, and hardware interrupt alarm functions. It features excellent multi-stage power management strategies, supporting normal operation, idle, sleep, and PD/shipping modes as low as 2µA. It is very suitable for various multi-cell portable digital devices, smart lithium battery packs, and electric tool applications.
A lithium battery protection chip with marking 1047DL.
Two lithium battery protection MOSFETs come from Eternal Yi Yuan Technology, model ET6310, using a PDFN5*6 package, with a breakdown voltage of 30V and RDS(on) of 1.9mΩ.
The other lithium battery protection MOSFET is also the Yi Yuan Technology ET6310.
The buck-boost controllers for the two channels come from Southchip Technology, model SC8815A. It is a high-efficiency bidirectional synchronous buck-boost controller supporting 1-6 cell battery charging, featuring an I2C interface. One of them is shown above.
The SC8815A supports complete lithium battery charge management, where battery charging current and voltage, reverse discharge output voltage, and input/output current limits can all be controlled via the I2C bus.
The SC8815A integrates a 10-bit ADC, features charge status indication, supports automatic adapter insertion and load insertion detection, includes undervoltage, overvoltage, and overcurrent protection, and supports short-circuit and overheat shutdown protection. The chip uses a QFN32 package, suitable for PD fast charging power banks, USB-C hubs, and industrial power applications.
Paired with the first Southchip SC8815A, the four synchronous buck-boost switch transistors come from Yi Yuan, model ET6460T, using a PDFN5*6 package, with a breakdown voltage of 40V and RDS(on) of 6.5mΩ.
The second synchronous buck-boost chip also uses the Southchip Technology SC8815A.
Paired with the second Southchip SC8815A, the four synchronous buck-boost switch transistors also come from Yi Yuan, model ET6300T, which is an NMOS transistor with a breakdown voltage of 30V and RDS(on) of 5mΩ, using a PDFN3.3*3.3 package.
A close-up of one channel's 3.3μH buck-boost inductor.
A close-up of the other channel's buck-boost inductor.
The protocol chip comes from CHIPSEA, being the CS32G020 series 32-bit USB Type-C and PD3.0 controller. This chip embeds an ARM Cortex-M0 core with a maximum main frequency of 48MHz, equipped with 64KB program Flash, 4KB LDROM, and 8KB SRAM, meeting various power management scenarios requiring high-performance CPUs and industrial-grade control.
The chip supports two independent Type-C PD3.0 communications and widely compatible with QC4.0+, SCP, FCP, AFC, BC1.2, and Apple 2.4A fast charging protocols. Additionally, the CC pins and built-in control ports feature 21V high-voltage tolerance characteristics.
The CS32G020 integrates a 12-bit ADC, 11-bit DAC, analog comparator, three 16-bit timers, and rich communication interfaces including UART, SPI, and I2C, along with up to 27 GPIO pins.
The chip supports a wide voltage range of 2.5V~5.5V and an industrial-grade operating temperature range of -40°C~85°C. It includes multiple low-power modes and multi-level Flash security policies, and supports convenient firmware upgrades via the Type-C interface or serial interface.
This series is available in QFN24 and QFN32 packages, widely applicable to PC power adapters, mobile phone chargers, power banks, car chargers, docking stations, and other fields.
The two VBUS MOSFETs used for the built-in USB-C cable come from Yi Yuan, marked ET6403.
The VBUS switch transistor used for the USB-C interface comes from Yi Yuan, marked ET6331.
The VBUS switch transistor used for the USB-A interface also comes from Yi Yuan, marked ET6331.
A filter solid-state capacitor comes from YMIN Yongming, specified as 25V 100μF.
Another filter capacitor also comes from Yongming, specified as 25V 220μF.
Yet another filter solid-state capacitor also comes from Yongming, specified as 25V 100μF.
Looking at the chips on the screen control sub-board, the screen driver MCU comes from EastSoft, marked 0101NF, used for color screen driving, button interaction, and product information management.
The memory chip comes from PUYA, model P25Q32SH, which is a 32Mbit capacity NOR Flash chip used for storing firmware information, employing a SOP8 package.
The LDO regulator chip on the sub-board comes from MICRONE, being the ME6203 series LDO regulator chip, using a SOT89-3 package.
Teardown complete. Here is the full component lineup.
Chongdiantou.com Summary
Finally, here is the bill of materials for the product for easy reference.
The Vidda C1 140W 20000mAh super power bank is equipped with a built-in USB-C cable, a USB-C port, and a USB-A port. Both C-ports support 70W fast charging input and up to 100W fast charging output. Additionally, the color screen on the front supports querying output/input power and product status information, making daily use more reassuring.
Through teardown analysis by Chongdiantou.com, it was found that the interior of the power bank adopts a dual-layer PCBA design, maximizing space utilization. The product contains four Haopeng 5000mAh soft-pack cells and features an independent protection small board. It uses the INJOINIC IP3561Q lithium battery protection analog front-end chip paired with a secondary protection chip, Yi Yuan lithium battery protection MOSFETs, and dual NTC thermistors to achieve lithium battery protection and fuel gauging.
The main control board employs two Southchip Technology SC8815A bidirectional synchronous buck-boost controllers, respectively paired with Yi Yuan Technology ET6460T and ET6300T switch transistors to form independent H-bridge buck-boost circuits. The CHIPSEA CS32G020 protocol chip manages fast charging protocols and power distribution for the three ports. The VBUS switch transistors are selected from Yi Yuan ET6403 and ET6331, while the built-in solid-state capacitors are all from Yongming.
The screen sub-board carries an EastSoft screen driver MCU and a PUYA P25Q32SH flash chip to drive the TFT color screen. The PCBA module surfaces are extensively coated with thermal adhesive to assist in heat dissipation and shock resistance. Overall, the component selection is robust, and the hardware/software design fully aligns with the 2026 new national standard specifications for power banks.