Introduction
A shared power bank is a convenient solution for on-the-go charging, especially in busy public spaces like malls, airports, and stadiums. They offer users the flexibility to recharge their devices anytime without carrying their own power banks.
Addressing common issues such as slow charging speeds and limited compatibility found in many shared power banks, Chinese company Meituan has introduced a new model featuring 22.5W fast charging. Equipped with built-in USB-C and Lightning cables, this upgraded power bank delivers faster, more reliable charging across a wide range of devices. Let’s take a closer look at its Internal components and structure.
Product Appearance
It features a bright yellow casing with a matte finish and rounded corners.
The front is printed with the Meituan logo, safety instructions, and other notices.
At the bottom, there are two built-in short cables with corresponding storage slots and return guide arrows.
The built-in cables are USB-C and Lightning.
Model: MT-D-7BDY0
Battery Type: Lithium Polymer Battery
Battery Charging Limit Voltage: 4.2V
Battery Energy: 7000mAh / 3.7V / 25.9Wh
Typical Capacity: 4600mAh (5V 1A)
Type-C Input: 5V 3A
Type-C Output: 5V 3A, 9V 2.5A, 10V 2.25A
Lightning Output: 5V 2.4A, 9V 2.5A
Multi-Port Output:
Type-C + Lightning: 5V 3A MAX
Certified: CCC, CB, CE
There are four LED battery indicator lights on the top.
There are charging contact points on both sides of the opposite end.
There are locking slots on both sides of the body. This side also features a USB-C input port.
The opposite side is equipped with a power button.
The length of the power bank is about 142.04 mm (5.59 inches).
The width is about 70.6 mm (2.78 inches).
The thickness is about 15.73 mm (0.62 inches).
The length of the USB-C cable is about 5 cm (1.97 inches).
The length of the Lightning cable is also about 5 cm (1.97 inches).
That's how big it is in the hand.
The weight is about 186 g (6.56 oz).
ChargerLAB POWER-Z KM003C shows that the USB-C cable supports UFCS, QC3.0, SCP, PD3.0, DCP, and Apple 2.4 charging protocols.
And it has two fixed PDOs of 5V3A and 9V2.5A. It has one set of PPS, which is 5-11V2.5A.
Teardown
Next, let's take it apart to see its internal components and structure.
After unclipping the snap-on casing, protective foam padding is found on the inside.
The PCB is secured with screws.
The solder joints on the cores of the two built-in cables are solid and well-made.
The battery cell is connected to the PCB via nickel strip spot welding. The LED indicator lights are connected to the PCB via a ribbon cable.
After removing the PCB and battery cell, protective foam and padding can be seen inside. A thermal pad is attached to the other side of the PCB.
The battery cell is manufactured by EVE, model 115878CS. It has a nominal voltage of 3.7V, a rated capacity of 7000mAh, and an energy rating of 25.9Wh. The charging limit voltage is 4.2V, and it is CCC certified.
The front side of the PCB features a large area of exposed copper with added solder to enhance heat dissipation. It also includes a protocol chip and an MCU.
The other side houses a lithium battery protection chip, a synchronous buck converter, an inductor, and three VBUS MOSFETs.
The battery protection chip is the XySemi XB8989A, which provides overcharge, overdischarge, and overcurrent protection for the battery cell.
The SouthChip SC8933 is a synchronous buck converter with reverse boost discharge capability. It integrates two ultra-low Rds(on) NMOS transistors and supports high-efficiency charging and discharging operations up to 12V 2A with an efficiency of up to 92%. It features an I²C interface for comprehensive charge/discharge control and robust protection mechanisms for various fault conditions. The chip also includes integrated gate drive control for port-side NMOS isolation switches, supporting up to three USB ports. With a compact 4×4 mm QFN package and minimal external components, it offers excellent space efficiency.
Here is the information about SouthChip SC8933.
The paired 2.2 μH inductor is secured with adhesive for reinforcement.
The protocol chip is the SouthChip SC2021A, a highly integrated Type-C/PD and DPDM fast charging controller. It complies with the latest Type-C and PD 3.0 standards and has passed USB PD 3.1 compliance testing.
The chip supports proprietary high-voltage fast charging protocols and includes one USB-C interface along with two DPDM interfaces, making it suitable for dual-port fast charging applications (1A + 1C).
The SC2021A integrates a high-performance 32-bit MCU core, 2.5 KB of RAM, and 32 KB of MTP memory, with support for proprietary fast charging protocols. To minimize the need for external components, the SC2021A incorporates a USB PD baseband PHY, Type-C detection, dual DPDM PHYs, an internal VBUS discharge path, VCONN power supply, programmable feedback compensation, voltage and current sensing, a 10-bit ADC, dual 10-bit DACs, NMOS gate drivers, an I²C interface, and various protection circuits.
It supports multiple protection mechanisms, including OVP, UVP, OCP, SCP, OTP, DPDM OVP, CC OVP, VCONN OVP, VCONN OCP, and VCONN short-circuit protection—ensuring stable and reliable system operation. The SC2021A comes in a compact 4×4 mm QFN-32 package. With excellent protocol compatibility and a rich set of control interfaces, it is suitable for car chargers and a wide range of fast-charging applications.
The MCU is the Chipsea CS32L010F8, a 32-bit low-power microcontroller based on the ARM Cortex-M0 core. It operates at a maximum frequency of 24 MHz and features 64 KB of embedded Flash memory and 4 KB of SRAM. The chip comes in a QFN-20 package.
The VBUS MOSFET for the Lightning cable output is marked with 8205.
The VBUS MOSFET for the USB-C cable output has the same part number.
The VBUS MOSFET at the charging contact points also has the same part number.
The charging contact points are gold-plated, and the base is reinforced with adhesive.
The PCB for the LED battery indicators features cutouts on both sides.
There are no components on the back side.
Well, those are all components of the Meituan 7000mAh 22.5W Shared Power Bank.
Summary of ChargerLAB
Here is the component list of the Meituan 7000mAh 22.5W Shared Power Bank for your convenience.
It is equipped with USB-C and Lightning cables and features a built-in 7000mAh battery cell. It supports multiple fast charging protocols, including QC 3.0, SCP, PD 3.0, and PPS, with output power of up to 22.5W and 27W, respectively.
After taking it apart, we found that it uses a lithium polymer battery cell from EVE, which is CCC certified. Battery protection is handled by the XySemi XB8989A chip, providing overcharge, overdischarge, and overcurrent protection. The power management system is built around the SouthChip SC8933 synchronous buck converter, working in conjunction with the SC2021A protocol controller and the Chipsea CS32L010F8 MCU for overall system control. As a shared power bank, it stands out with solid performance, quality components, and build quality.
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