Ugreen 10000mAh 20W Two-way Fast Charging Power Bank – Black – PB311

The Ugreen PB311 combines high-capacity portable power with advanced charging technology in a compact, sleek design. This versatile power bank delivers efficient charging for modern devices through multiple output options and rapid recharging capabilities.

Dual-Port Fast Charging System

The PB311 power bank features both USB-C and USB-A output ports to accommodate various devices:

• USB-C Port: Supports Power Delivery (PD) protocol delivering up to 20W output
• USB-A Port: Utilizes Quick Charge technology with up to 18W output
• Combined Output: Manages 15W total when both ports are used simultaneously

This dual-port configuration enables the PB311 to charge smartphones, tablets, earbuds, and other USB-powered devices efficiently. Furthermore, the intelligent power management system automatically adjusts output based on connected device requirements for optimal charging speeds.

Two-Way Fast Charging Technology

The PB311 not only delivers fast charging to connected devices but also recharges rapidly itself:

• Input Charging: Up to 20W via USB-C Power Delivery
• Recharge Time: Approximately 3 hours from 0% to 100% (using a 20W adapter)
• Pass-Through Capability: Charges connected devices while simultaneously recharging itself

This two-way fast charging technology significantly reduces downtime between uses, making the PB311 particularly useful for users who need reliable power throughout busy days. Additionally, the pass-through function allows the power bank to serve as a charging hub when wall outlets are limited.

Compact Design With High Capacity

Despite housing a substantial 10000mAh battery, the Ugreen PB311 maintains a pocket-friendly profile:

• Dimensions: 108 × 52 × 22mm (4.25″ × 2.05″ × 0.87″)
• Weight: 198g (6.98oz)
• Form Factor: Rounded edges with matte black finish
• Grip: Textured side panels for secure handling

The PB311’s space-efficient design packs sufficient capacity to fully recharge an iPhone 13 approximately 1.8 times or a Samsung Galaxy S22 about 1.7 times. Moreover, its slim profile allows for easy storage in pockets, bags, and backpacks without excessive bulk.

Comprehensive Safety Features

The Ugreen PB311 incorporates multiple protection mechanisms to ensure safe operation:

• Over-current protection prevents excessive power flow
• Temperature control systems monitor and regulate internal heat
• Short-circuit safeguards protect both the power bank and connected devices
• Over-discharge prevention extends battery lifespan

These integrated safety features work continuously to maintain secure charging conditions. Consequently, users can connect devices with confidence regardless of environmental conditions or charging duration.

Intuitive Status Display

The PB311 features a digital LED display that provides precise battery level information:

• Numerical percentage indicator shows exact remaining capacity
• Clear visibility in various lighting conditions
• Automatic display timeout conserves power
• One-touch activation button for quick status checks

This digital readout eliminates guesswork when assessing remaining power, allowing users to plan device usage accordingly. Subsequently, the PB311 reduces the likelihood of unexpected power depletion during critical moments.

Ideal Users

The Ugreen PB311 is particularly well-suited for:

• Business travelers who value the compact 198g weight while needing sufficient power for full-day use – the 10000mAh capacity provides multiple phone charges without adding significant weight to carry-on luggage
• Tech-oriented individuals using multiple device types – the combination of USB-C and USB-A ports accommodates both newer and legacy devices without requiring adapters
• Efficiency-focused users who appreciate the 20W fast charging capability that can power an iPhone from 0% to 60% in approximately 30 minutes
• Commuters requiring reliable backup power – the durable construction withstands daily transport while maintaining performance consistency

Package Contents

Each Ugreen PB311 comes complete with:

• 10000mAh 20W Power Bank (PB311)
• USB-C to USB-C charging cable (30cm)
• User manual and warranty information
• Travel pouch

Technical Specifications

Battery Specifications

• Capacity: 10000mAh / 37Wh
• Cell Type: Lithium Polymer
• Rated Cycles: 500+ with 80% capacity retention
• Energy Efficiency: >85%

Output Specifications

• USB-C PD Output: 5V/3A, 9V/2.22A, 12V/1.67A (20W max)
• USB-A QC Output: 4.5V/5A, 5V/4.5A, 5V/3A, 9V/2A, 12V/1.5A (18W max)
• Dual Port Output: 5V/3A (15W combined max)

Input Specifications

• USB-C PD Input: 5V/3A, 9V/2.22A, 12V/1.67A (20W max)
• Recharge Time: ~3 hours with 20W adapter, ~5 hours with 10W adapter

Protection Systems

• Over-voltage protection
• Over-current protection
• Short-circuit protection
• Over-temperature protection
• Over-discharge protection
• Over-charge protection

Physical Attributes

• Dimensions: 108 × 52 × 22mm
• Weight: 198g
• Color: Black
• Material: Fire-resistant ABS plastic
• Display Type: Digital LED percentage indicator

Compatibility

• Smartphones: iPhone, Samsung, Google Pixel, etc.
• Tablets: iPad, Samsung Tab, etc.
• Earbuds: AirPods, Galaxy Buds, etc.
• Other USB-powered devices: Speakers, smartwatches, etc.