UGREEN PB311 Two-Way Fast Charging Power Bank – 10000mAh Portable Charger

The UGREEN PB311 is a 10000mAh power bank with 20W bidirectional fast charging that quickly powers your devices and recharges itself in under 3 hours. This compact black charger serves students navigating full course loads and professionals managing demanding work schedules who need reliable backup power without lengthy wait times. The sleek black finish maintains a professional appearance while the dual output ports handle multiple devices simultaneously.

Key Features & Benefits

• 20W Bidirectional Fast Charging: Charges your iPhone to 50% in approximately 30 minutes and fully recharges the power bank itself in 2-3 hours. This efficiency means less planning around charging cycles and more time actually using your devices during critical moments.
• 10000mAh Reliable Capacity: Provides 2-3 full charges for most smartphones or one complete charge for tablets, ensuring you can power through extended lectures, long flights, or full workdays away from outlets without battery anxiety.
• Dual Device Charging: Power your smartphone and wireless earbuds simultaneously, or keep both your phone and smartwatch charged during travel. This eliminates the frustration of choosing which device gets priority when you’re running low on battery.
• Universal USB-C and USB-A Ports: Compatible with virtually every modern device including iPhones, Android phones, iPads, Kindles, and Bluetooth accessories. The combination of port types ensures you can charge older and newer devices without carrying multiple power banks.
• Classic Black Design: The professional matte black finish resists fingerprints and looks appropriate in any setting from lecture halls to boardrooms. It blends seamlessly with business laptops, black smartphone cases, and professional bags without drawing attention.

Technical Specifications

Battery & Charging Performance

• Battery Capacity: 10000mAh (37Wh)
• Cell Type: Lithium polymer battery
• Energy Conversion Rate: Approximately 65% (delivers ~6500mAh usable power)
• Full Recharge Time: 2.5-3 hours with 18W or higher adapter
• Cycle Life: 500+ charge cycles to 80% capacity

Input Specifications

• USB-C Input: 5V/3A, 9V/2A (18W max)
• Micro-USB Input: 5V/2A, 9V/2A (18W max)
• Recommended Charger: 18W or higher USB wall adapter for optimal recharge speed

Output Specifications

• USB-C Output: 5V/3A, 9V/2.22A, 12V/1.67A (20W PD max)
• USB-A Output: 5V/3A, 9V/2A, 12V/1.5A (18W QC max)
• Combined Output: 5V/3A (15W) when both ports used simultaneously
• Smart Power Allocation: Automatically adjusts output based on connected devices

Physical Characteristics

• Dimensions: 132 × 69 × 16mm
• Weight: Approximately 215g
• Color: Black (matte finish)
• LED Indicators: 4-level battery status display
• Build Material: Durable ABS plastic housing

Safety & Compliance

• Multi-Protection System: Overcharge, over-discharge, overcurrent, overvoltage, short-circuit, and temperature protection
• Certifications: FCC, CE, RoHS certified
• Aviation Compliant: Under 100Wh – approved for airline carry-on luggage

Use Cases & Applications

For Students

The UGREEN PB311 handles demanding academic schedules where charging access is unpredictable. Charge your phone during back-to-back classes while keeping your tablet ready for digital textbooks or note-taking apps. The fast recharge capability means you can plug it in during a 2-hour lab session and have it ready for evening study groups. Students living in dorms with limited outlets appreciate having personal backup power that doesn’t require waiting for roommates to finish charging. The black color withstands the wear of daily transport in backpacks alongside textbooks and laptops.

For Business Professionals

This power bank maintains connectivity during crucial business moments like client presentations, trade shows, or all-day conferences where wall outlets are scarce or inconvenient to access. The 20W output charges modern smartphones quickly during brief breaks between meetings, ensuring you don’t miss important calls or emails. Business travelers benefit from having reliable power during airport layovers, taxi rides, and hotel rooms with limited outlet placement. The professional black appearance suits corporate environments and doesn’t look out of place during video calls or in-person meetings.

Daily Commuting

Regular commuters on trains, buses, or rideshares use the PB311 to power entertainment, navigation, and communication throughout extended travel times. The power bank maintains charge for several weeks when not in use, making it dependable even if you forget to recharge it immediately after each use. For those working remotely from coffee shops or coworking spaces, it provides independence from hunting for available outlets during peak hours.

Content Creation & Streaming

Students creating video content for classes or professionals managing social media accounts need sustained phone battery for recording, editing, and uploading. The PB311 keeps your camera running during extended filming sessions or live streams. However, for extremely power-intensive tasks like 4K video recording, consider that you’ll drain both your phone and power bank faster than typical usage.

Emergency Backup

Keep this power bank in your car, desk drawer, or emergency kit as reliable backup power during unexpected situations. It retains approximately 80% charge after 6 months of storage, making it dependable when power outages occur or when you forget to charge your phone overnight before an important day.

Model Number: PB311
Package Contents: Power bank, USB-C to USB-C charging cable, user manual

Pro Tip: For fastest recharging, use an 18W or higher USB wall adapter (not included). Standard 5W phone chargers will recharge the power bank but take significantly longer (6+ hours).