UGREEN 20000mAh Two-Way Fast Charging Power Bank – PB720

The UGREEN PB720 is a 20000mAh portable power bank featuring 130W maximum output and 100W fast recharging through its dual USB-C ports. This compact charger includes two USB-C ports and one USB-A port with an LED display showing remaining battery percentage, making it practical for students powering laptops between classes and business professionals requiring multi-device charging during commutes or travel. The slim profile and lightweight design prioritize portability without sacrificing the power needed for modern USB-C laptops.

Key Features & Benefits

• 20000mAh Portable Capacity: Provides enough power to fully charge a MacBook Air, charge an iPhone 14 approximately 3-4 times, or keep an iPad running through extended work sessions, which means you can maintain productivity throughout full workdays without wall outlet access.
• 130W High-Power Output: Delivers up to 100W from a single USB-C port for fast-charging demanding laptops like MacBook Pro 14″, Dell XPS 13, or Surface Laptop while simultaneously charging phones through additional ports without sacrificing laptop charging speed.
• 100W Rapid Recharging: Fully recharges the power bank itself in approximately 1.5 hours using a 100W USB-C PD charger, so you can quickly top up during short breaks instead of overnight charging sessions required by conventional power banks.
• LED Percentage Display: Shows precise remaining battery level in 1% increments rather than vague LED indicators, which means you know exactly how much charge remains and can plan your power usage accordingly during critical work periods.
• Airline-Safe Design: Contains 72Wh capacity (under the 100Wh airline limit), ensuring you can carry the power bank in airplane cabin luggage on all commercial flights worldwide without special approval or restrictions.

Technical Specifications

Battery Specifications

• Capacity: 20000mAh / 72Wh (3.6V nominal)
• Battery Type: Lithium polymer (Li-Po) cells
• Cycle Life: 800+ charge cycles to 80% capacity
• Energy Efficiency: Approximately 85-90% conversion rate
• Rated Energy: 72Wh (TSA/IATA compliant for air travel)

Port Configuration

• USB-C1 Port: Bidirectional input/output, 100W maximum
• USB-C2 Port: Bidirectional input/output, 100W maximum
• USB-A Port: Output only, 22.5W maximum
• Total Maximum Output: 130W when using multiple ports

USB-C1/C2 Output Specifications

• Power Delivery: 5V⎓3A, 9V⎓3A, 12V⎓3A, 15V⎓3A, 20V⎓5A (100W max per port)
• PPS Support: 3.3-21V⎓5A (Programmable Power Supply)
• Supported Protocols: USB PD 3.0, PPS, QC 4+, QC 3.0/2.0, AFC, FCP, SCP
• Single Port Output: 100W maximum

USB-C1/C2 Input Specifications

• Fast Input: 5V⎓3A, 9V⎓3A, 12V⎓3A, 15V⎓3A, 20V⎓5A (100W max)
• Full Recharge Time: ~1.5 hours with 100W charger
• Standard Recharge: ~2 hours with 65W charger, ~3-4 hours with 30W charger
• Protocols: USB PD 3.0, QC 3.0/2.0

USB-A Output Specifications

• Standard Output: 5V⎓3A (15W)
• Quick Charge: 9V⎓2A, 12V⎓1.5A (18W)
• Maximum: 22.5W with compatible devices
• Protocols: QC 3.0, QC 2.0, AFC, FCP, SCP, Apple 2.4A, BC 1.2

Multi-Port Output Distribution

• USB-C1 Alone: 100W
• USB-C2 Alone: 100W
• USB-A Alone: 22.5W
• USB-C1 + USB-C2: 65W + 30W (95W total)
• USB-C1 + USB-A: 100W + 22.5W (up to 122.5W)
• USB-C2 + USB-A: 100W + 22.5W (up to 122.5W)
• All Three Ports: 65W + 30W + 22.5W (117.5W combined, up to 130W max)

Display Specifications

• Type: LED digital display
• Information: Battery percentage (0-100% in 1% increments)
• Visibility: Clear in daylight and low-light conditions
• Auto-Off: Display dims after inactivity to conserve power

Physical Specifications

• Dimensions: 4.92 × 2.09 × 1.10 inches (125 × 53 × 28mm)
• Weight: 12.3 oz (350g)
• Housing Material: PC + ABS flame-retardant plastic
• Color: Black with gray accents
• Finish: Matte texture, fingerprint-resistant

Safety & Protection Features

• Over-Current Protection: Prevents excessive current draw
• Over-Voltage Protection: Guards against voltage spikes
• Short-Circuit Protection: Automatic shutdown on short detection
• Over-Temperature Protection: Thermal monitoring with auto-shutoff
• Over-Charge Protection: Prevents battery damage during charging
• Over-Discharge Protection: Maintains battery health during use
• Foreign Object Detection: FOD protection for safe operation

Device Compatibility

• Laptops: MacBook Pro/Air M1/M2/M3, Dell XPS, HP Spectre, ThinkPad X1, Surface Laptop
• Tablets: iPad Pro/Air/Mini, Samsung Galaxy Tab, Surface Go/Pro
• Smartphones: iPhone 15/14/13/12 series, Samsung Galaxy S24/S23/S22, Google Pixel, all USB-C Android phones
• Gaming: Nintendo Switch, Steam Deck, ASUS ROG Ally
• Accessories: AirPods, Galaxy Buds, smartwatches, Bluetooth speakers, cameras

Standards & Certifications

• USB-IF Certified: USB Power Delivery 3.0 specification
• Safety Standards: UL, CE, FCC, RoHS compliant
• Battery Safety: UN38.3 transport tested
• Airline Approved: Under 100Wh for carry-on luggage

Package Contents

• 1 × UGREEN PB720 Power Bank (20000mAh)
• 1 × USB-C to USB-C cable (100W rated, 3.3ft/1m)
• 1 × User manual
• 1 × Travel pouch
• Note: USB-C wall charger sold separately (65W-100W recommended)

Environmental & Operating Conditions

• Operating Temperature: 0°C to 40°C (32°F to 104°F)
• Charging Temperature: 0°C to 45°C (32°F to 113°F)
• Storage Temperature: -20°C to 60°C (-4°F to 140°F)
• Humidity: 5% to 95% non-condensing

Use Cases & Applications

For Students: College students can charge MacBook Air or Windows ultrabooks during lectures, study sessions, and group projects without hunting for wall outlets in crowded libraries or coffee shops. The 20000mAh capacity provides approximately 6-10 hours of laptop use depending on workload intensity, ensuring you can complete assignments, attend online classes, or study throughout the day. Engineering students running simulation software or design students working with resource-intensive creative applications benefit from the 100W output that maintains laptop performance. The compact size fits easily into backpacks alongside textbooks without adding significant weight.

For Daily Commuters: Professionals with long commutes can work productively on trains, buses, or during rideshares by keeping laptops charged throughout the journey. The power bank transforms dead commute time into productive work hours for reviewing documents, answering emails, or preparing presentations. The LED percentage display provides confidence that you have sufficient charge for both morning and evening commutes before needing to recharge overnight.

For Business Travel: Consultants and sales professionals traveling between client meetings can maintain laptop charge during taxi rides, airport lounges, or hotel lobbies without competing for limited outlet access. The under-100Wh capacity ensures compliance with airline regulations worldwide, eliminating concerns about battery confiscation during security screening. Executives attending back-to-back meetings can keep presentation equipment charged throughout marathon meeting days.

For Remote Work Flexibility: Digital nomads and remote workers gain location independence by working from parks, outdoor spaces, or cafes with poor outlet availability. Freelancers meeting clients at various locations can confidently work for hours without outlet anxiety. The simultaneous charging capability keeps your laptop productive while maintaining phone battery for client communication and calendar management.

For Content Creation: Photographers editing RAW images on location can power laptops through culling and basic editing sessions without returning to studios or hotels. Travel vloggers can keep laptops charged for video editing, cameras charged for shooting, and phones ready for social media updates during multi-location shoot days. Podcast producers recording remote interviews can power laptops, audio interfaces, and microphones without generator access.

For Student Travelers: Students studying abroad or backpacking during gap years can maintain connectivity for researching destinations, booking accommodations, completing coursework, or video calling family without depending on hostel or cafe outlet availability. The durable construction withstands the rigors of budget travel in backpacks.

For Emergency Preparedness: Households can maintain communication devices charged during power outages—the 20000mAh capacity provides multiple smartphone charges for emergency calls, news updates, and family coordination. The power bank can charge laptops for remote work when home offices lose power during storms or grid maintenance.

For Healthcare & Field Professionals: Nurses and doctors using tablets for patient records can maintain device charge throughout 12+ hour shifts without accessing staff charging stations. Field researchers, surveyors, or inspectors can power tablets and laptops during outdoor data collection without vehicle or generator dependence.

The UGREEN PB720 balances capacity, power output, and portability effectively for mobile professionals. However, understand that the 20000mAh specification (at 3.6V) translates to 72Wh of actual energy—when charging devices at different voltages, conversion efficiency affects usable capacity. For example, fully charging a MacBook Air (50Wh battery) will consume approximately 60-65Wh from the power bank due to conversion losses, leaving roughly 10Wh remaining rather than the mathematical 22Wh you might expect.

The 130W maximum output only applies when specific port combinations are used—single USB-C port maximum remains 100W. Verify your laptop’s power requirements before purchasing; most ultrabooks and mainstream laptops require 45-65W and will charge quickly, but high-performance laptops requiring 130W+ may charge slowly or not maintain battery level under heavy processor loads.

For optimal recharge speed, use a dedicated 100W USB-C PD wall charger—the included cable supports 100W charging. Using lower-wattage chargers (30W, 45W, 65W) extends recharge time proportionally but won’t damage the power bank. The power bank supports pass-through charging, allowing you to charge connected devices while the power bank itself recharges, though this generates additional heat and slightly reduces overall efficiency.

The LED display shows remaining percentage accurately but does consume minimal power—the display automatically dims after brief inactivity to conserve energy. The power bank may feel warm during high-power output (100W laptop charging) or fast recharging—this is normal thermal behavior, though avoid using on soft surfaces like beds or couches that trap heat. Allow adequate ventilation during intensive charging sessions.

Battery capacity naturally degrades with use—expect approximately 80% of original capacity after 800 charge cycles, which translates to roughly 2-3 years of regular use depending on charging frequency. To maximize lifespan, avoid fully depleting the battery regularly, and store at 40-60% charge when not using for weeks or months. The power bank includes multiple safety certifications and protection circuits, but always use quality USB-C cables and chargers from reputable manufacturers to ensure safe operation.

The 72Wh capacity meets current airline regulations for carry-on luggage, but regulations can change—verify with your specific airline before international travel. Some airlines require that mAh and Wh ratings be clearly visible on the power bank, which they are on the PB720. Never pack the power bank in checked luggage, as lithium batteries are prohibited in cargo holds on commercial aircraft.