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Home › Teardowns › Accessories › Teardown of UGREEN 120W DC UPS (US3000)
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Teardown of UGREEN 120W DC UPS (US3000)

Rusell
August 22, 2025

Introduction

Previously, UGREEN released several NAS private cloud products, including the DXP 6800Pro and the DXP 8800 series. To address the risk of data corruption caused by unexpected power outages with these devices, the company specifically developed a 120W DC UPS.

This UPS features a built-in 12,000mAh lithium battery, capable of providing up to 10 minutes of emergency power supply. Its unique DC direct-output architecture eliminates the traditional AC/DC conversion stage found in conventional UPS systems. Compact in size and weighing only 441 grams, it is designed for both efficiency and portability. Next, let’s take it apart to see its internal components and structure.

Product Appearance

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The front of the packaging features the UGREEN logo, name, a visual of the device, and key selling points.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The bottom of the packaging displays the product specifications along with manufacturer and vendor information.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The package includes the UGREEN 120W DC UPS, a base stand, a data cable, and some documentation.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The included cable is a USB-A to USB-C type.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The length of the cable is about 53 cm (20.87 inches).

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

It comes with a built-in DC power cable. The surface features anodizing and sandblasting treatments, giving it a premium and refined texture.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The UGREEN logo is prominently printed at the center of both the front and back sides.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

On the same end as the DC power cable, you'll also find a power button, a buzzer, a DC input port, and a USB-C port.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Each port and button is clearly labeled with corresponding icons and specifications for easy identification.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Close-up view of the DC power cable connector.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The other end is affixed with a nameplate.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Model: US3000

Input: 12V 10A, 19V 7.9A, 20V 7A

Output: 12V 10A, 120W Max

Output Power: 120W Max

Battery Type: Lithium-ion Battery

Battery Rated Energy: 43.2Wh (14.4V 3000mAh)

Battery Rated Capacity: 12,000mAh (4 x 3000mAh)

Voltage Transfer Time: 0s

USB: Data Communication

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The length is about 120.61 mm (4.75 inches).

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The width is about 80.48 mm (3.17 inches).

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The thickness is about 29.59 mm (1.16 inches). 

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The length of the cable is about 28 cm (11.024 inches).

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

That's how big it is in the hand.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The weight is about 439 g (15.49 oz).

Teardown

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

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

After removing the casing on one end, the internal mounting screws are revealed.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Once the screws are removed, the internal module can be slid out. The other end is secured with clips.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The module is housed within a protective plastic frame. The PCB is covered with a Mylar sheet, while the battery cells are wrapped in foam for added cushioning and protection.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Remove the Mylar sheet and foam. There is highland barley insulation paper on the inside of the foam.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The PCBA module adopts a dual-layer design, with the two layers secured together using metal standoffs and screws.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Remove the upper PCB.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The battery pack is connected to the lower PCB via a pluggable wire connector.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The DC power cord is reinforced internally.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Remove the lower PCB. A thermal pad is placed in the slot.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Remove the battery pack. Adhesive is applied in the slot for fixation.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Barley paper is applied to the sides and positive terminals of the four battery cells in the pack. The cells are interconnected by spot-welded nickel strips.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The nickel strips are soldered to the wires. Based on the spot-welding configuration at both ends of the four battery cells, it can be determined that the cells are connected in series.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

All four lithium batteries are SunPower INR18650-3000 cells, each with a capacity of 3000 mAh, a nominal voltage of 3.7 V, and an energy rating of 11.1 Wh. The cells are CCC certified.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Capacitors, inductors, and other components on the front side of the lower PCB are reinforced with adhesive.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

After removing the white adhesive, the front side reveals a battery protection chip, a buck inductor, filter capacitors, a thermistor, and other components.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The backside contains a synchronous buck-boost converter, a synchronous buck controller, synchronous buck MOSFETs, and switching MOSFETs.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The battery protection chip is the CBM8580KV6NT from Chipsea. It is a fully integrated single-chip solution designed for 2-cell, 3-cell, and 4-cell series lithium-ion or lithium-polymer battery packs, offering comprehensive features for fuel gauging, protection, and authentication.

The CBM8580KV6NT utilizes its integrated high-performance analog peripherals to measure key parameters such as available capacity, voltage, current, and temperature of the lithium battery pack. It maintains accurate data logging and communicates this information to the system host controller via an SMBus 3.1-compatible interface.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Here is the information about Chipsea CBM8580KV6NT.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The battery protection MOSFETs are CRTM025N03L from CR MICRO. These are N-channel MOSFETs with a voltage rating of 30 V and a low on-resistance of 2.1 mΩ. They are packaged in a DFN5×6 form factor.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The current sense resistor has a resistance value of 1 mΩ.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Close-up of the SMD fuse at the battery end.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The synchronous buck-boost converter is the TI TPS55289. It supports input voltages up to 30 V and output voltages ranging from 0.8 V to 22 V. The device integrates four MOSFETs, providing a compact solution for USB PD applications. It is packaged in a VQFN-21 form factor.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Close-up of the 10 μH buck-boost inductor used in conjunction with the converter.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The MOSFET used for power control in the buck circuit is the CR MICRO CRTM025N03L.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The synchronous buck controller is the SC8002 from SouthChip. It supports input voltages up to 36 V, features high-precision output current limiting, and supports independent current limiting for dual channels. It is suitable for applications such as car chargers, multi-port chargers, and USB hubs.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The synchronous buck MOSFETs are CRSM060N06L2 from CR MICRO. These are N-channel MOSFETs with a voltage rating of 63 V and an on-resistance of 5.3 mΩ. They are packaged in a DFN5×6 form factor.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Close-up of the second CR MICRO CRSM060N06L2 MOSFET.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

An insulating phenolic board is placed beneath the synchronous buck-boost inductor.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The output filter capacitor is from Jianghai, with a specification of 16V, 330μF.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The filter inductor is insulated with heat shrink tubing.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The 2mΩ sense resistor is used for current detection.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The ideal diode controller is the LM74610-Q1 from TI, marked with “ZDSK.” It is used for input pass-through control and comes in a VSSOP-8 package.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The switching MOSFETs are NCEP40PT15G PMOS devices from NCEPower, rated at -40 V with an on-resistance of 2.8 mΩ. They come in the DFN5×6-8L package. Three of these MOSFETs are used for power pass-through output and battery buck output switching.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Close-up of the SMD fuse at the input end.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The three filter capacitors are from CapXon, each rated at 25 V and 150 μF.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Close-up of the thermistor.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The front side of the upper PCB features an MCU for overall system control.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The other side includes connection headers and a buzzer.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

The MCU is a GD32F303RCT6 from GigaDevice, featuring a Cortex-M4 core running at up to 120 MHz. It has 256 KB of flash memory and 48 KB of SRAM, and supports PWM signal output.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Close-up of the 8.0000MHz SMD crystal oscillator.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Close-up of the chip marked with "A6."

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Close-up of the chip marked with "A8."

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Close-up of the buzzer.

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Well, those are all components of the UGREEN 120W DC UPS.

Summary of ChargerLAB

Teardown of UGREEN 120W DC UPS (US3000)-Chargerlab

Here is the component list of the UGREEN 120W DC UPS for your convenience.

It features a unibody high-precision metal chassis that ensures a premium feel, enhanced drop resistance, and efficient heat dissipation. The built-in 12,000 mAh lithium-ion battery pack enables seamless 0-second switchover during power outages, ensuring uninterrupted operation and preventing data loss or file corruption. 

It supports 12V 10A, 19V 7.9A, and 20V 7A input voltages, making it compatible with UGOS Pro-based systems, such as the DH2600, DX4600 series, DXP2800, DXP4800 series, and DXP480T Plus. It integrates nine protections, including power-off protection, short-circuit protection, and overheat protection. With technologies like overcharge, over-discharge, overvoltage, and surge protection, it ensures stable performance even in extreme conditions such as lightning storms and voltage fluctuations.

After taking it apart, we found that the battery pack consists of four SunPower INR18650-3000 cells connected in series, protected by the Chipsea CBM8580KV6NT. The power regulation solution uses the TI TPS55289 and the SouthChip SC8002, with MOSFETs supplied by CR MICRO and NCEPower. The MCU is a GigaDevice GD32F303RCT6. Fuses are present at both the input and battery ends, and it features well-implemented thermal management and insulation protection measures.

Related Articles:
1. Teardown of StarCharge 7kW Smart AC Charger (AC0070GB060)
2. Teardown of UGREEN Thunderbolt 5 80Gbps M.2 NVMe SSD Enclosure (D705)
3. Teardown of OPPO 10000mAh 22.5W Energy Jelly Power Bank (PBSV00)

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