Portable Power Bank UGREEN 20,000 mAh 165W (55987B) for charging laptops, phones and tablets

UGREEN Portable Power Bank 20,000 mAh 165W (model 55987B) is a compact high-capacity charger designed to supply power to laptops, smartphones and tablets. It combines a large battery capacity with multi-port fast charging capability to extend device runtime during travel, remote work or power interruptions. The power bank supports high-wattage output that accommodates modern laptops as well as smaller USB-C and USB-A devices.

Advantages

This power bank provides a balance of high energy density and portable size, enabling multiple full charges for phones and significant runtime extension for tablets and laptops. Its high maximum output supports fast charging for compatible devices, while multiple output ports allow simultaneous charging of several devices. The device includes built-in protections against overcurrent, overvoltage and short circuits to ensure safe charging of connected electronics.

Suitable for

• Charging laptops and ultrabooks while traveling or working remotely
• Powering smartphones and tablets on long trips or during outdoor activities
• Emergency backup power during outages
• Charging multiple devices simultaneously

Key specifications

• Battery capacity: 20,000 mAh (nominal)
• Maximum output power: up to 165W
• Output ports: multiple high-power USB-C and USB-A ports (supports simultaneous use)
• Input options: fast recharging via compatible high-wattage USB-C input
• Protection features: overcurrent, overvoltage, short-circuit and temperature protection
• Form factor: portable, pocketable design suitable for travel

How to use

Connect the power bank to your device using the appropriate USB-C or USB-A cable. For laptops that require high-wattage charging, use a compatible USB-C to USB-C cable and ensure the laptop supports USB Power Delivery at the required wattage. Multiple devices can be connected at once, but total available power will be distributed among active ports. Recharge the power bank itself by connecting it to a suitable high-wattage USB-C power adapter; charging time depends on the adapter output.

Recommendations

To maximize battery life and performance, store the power bank partially charged if not used for extended periods, avoid exposing it to extreme temperatures, and use quality cables rated for the required wattage. When charging high-power laptops, confirm that the connected cable and adapter support the laptop's input power to achieve optimal charging speed.