Product Overview
The charmast 20000mAh Portable Charger with Built-in Cables is a high-capacity power bank designed for users who need reliable, on-the-go charging without the hassle of extra cords. Ideal for travelers, remote workers, and anyone with multiple devices, this portable charger delivers up to 3–4 full charges for most smartphones and supports fast charging for iPhones, Androids, tablets, and more. Its compact design packs double the capacity of standard 10,000mAh models while remaining airline-approved for carry-on use.
Key Features
- Built-In Multi-Cable Design: Includes USB-C, Lightning, and Micro-USB cables permanently attached—eliminating the need to carry separate charging cords and reducing clutter during travel or daily use.
- 22.5W PD Fast Charging Support: Delivers significantly faster charging than standard wall adapters, enabling up to 50% charge in about 30 minutes for compatible devices like iPhone and Samsung phones.
- Digital Power Display: Unlike basic LED indicators, the built-in screen shows exact battery percentage (0–100%), so you always know your remaining power without guesswork.
- Six Output Ports: Charge six devices simultaneously—two via built-in cables and four additional ports (USB-A ×2, USB-C ×1)—perfect for professionals managing phones, tablets, earbuds, and smartwatches at once.
- Dual Recharge Methods: Recharge using the included USB-A cable (12 hours) or connect an external USB-C cable (6 hours with a 18W+ charger), offering flexibility based on your setup.
Technical Specifications
- Capacity: 20,000mAh
- Micro Input: 5V/2A, 9V/2A, 12V/1.5A
- USB-C Input: 5V/2A, 9V/2A, 12V/1.5A
- USB-A Cable Input: 5V/2A
- USB-C Cable Input: 5V/2.6A, 9V/2A, 12V/1.5A
- USB-C Output: 5V/3A, 9V/2.22A, 12V/1.67A
- Cable Output (for iPhone): 5V/2.4A, 9V/2.22A
- Micro Cable Output: 5V/2.4A
- USB-A 1 Output: 5V/2.4A
- USB-A 2 Output: 4.5V/5A, 5V/4.5A, 9V/2A, 12V/1.5A
- Recharging Time: ~6 hours via USB-C port, ~12 hours via USB-A port
- Compatible With: All 5V/9V/12V USB-powered devices including iPhones, iPads, Samsung Galaxy, Pixel, Android phones, Kindles, tablets, AirPods, headphones, smartwatches, and fans
- Dimensions: 6.3 x 2.85 x 0.72 inches | Weight: Comparable to 35% heavier than 10K models but with double the energy density
- Package Contents: 1 × power bank with built-in cables, 1 × user manual, 1 × travel pouch
Benefits & Use Cases
This portable charger is engineered for real-world scenarios where uninterrupted power matters. Whether you’re on a weekend camping trip, commuting between meetings, flying across time zones, or navigating a festival without access to outlets, it ensures your phone stays charged throughout the day. The built-in cables mean you never forget your cord or fumble through tangled wires when your battery drops below 20%. With support for low-current devices such as Bluetooth headphones, fitness trackers, and even small fans, it functions as a universal backup solution for tech-heavy lifestyles.
Its compatibility spans nearly every modern device—from the latest iPhone 16 down to older models, Samsung Galaxy series, Google Pixels, iPads, Kindle readers, and various Android tablets. The dual-input recharging capability allows you to refuel the power bank itself quickly using a USB-C connection if you have a compatible adapter and cable, making it ideal for frequent travelers who prioritize speed.
Important Notes
- Always carry the power bank in your hand luggage—it is permitted in carry-on bags per airline regulations but not allowed in checked baggage.
- To recharge the internal battery via USB-C input, you must supply your own USB-C to USB-C or USB-A to USB-C cable; however, recharging via the included USB-A cord requires no additional accessories.
- For optimal fast charging performance, use a charger block rated at 18W or higher when using the USB-C input method.
- To enable low-power mode for sensitive electronics like watches or wireless earbuds, press and hold the ON/OFF button for 5–10 seconds until the LED digits rotate.
- The digital display provides precise battery status, unlike traditional multi-light indicators that only estimate remaining power.
- The package includes one portable charger with built-in cables, one manual, and one travel pouch—no extras are provided unless specified by the seller.
1 Widely Compatibility
2 Portable Blue
3 Airplane Allowed
4 Travel Essentials
5 Share Power
Recharge Conveniently Via Attached Recharging Cord:
Recharge your powerbank via its attached recharging cord conveniently;
No need to get another cable, no more struggling to find a charging cable anywhere;
Fully recharged around 12 hours (via built-in USB-A port); 6 hours (via built-in USB-C port);
Recharge Faster Via USB C Input:
Recharge your powerbank via its USB C input;
You need to get or use your A to C or C to C cable separately to recharge your powerbank;
Fully recharged around 6 hours (Your charger block and your separated charging cable required 18 Watts or above);
1 Package
2 Gifts Ideas
Capacity: 20000mAh
Micro Input: 5V-2A/9V-2A/12V-1.5A
USB C Input: 5V-2A/9V-2A/12V-1.5A
USB A Cable Input: 5V-2A
USB C Cable Input: 5V-2.6A/9V-2A/12V-1.5A
USB C Cable Output: 5V-3A/9V-2.22A/12V-1.67A
Cable Output (for iPhone): 5V-2.4A/9V-2.22A
Micro Cable Output: 5V-2.4A
USB A 1 Output: 5V-2.4A
USB A 2 Output: 4.5V-5A/5V-4.5A/9V-2A/12V-1.5A
Recharging Time: 6 hours (via built-in USB-C port); 12 hours (via built-in USB-A port)
Compatibility: Compatible with almost all cellphones. Compatible with iPhone & iPad series, compatible with all Android cellphones, tablets. Compatible with all 5V/9V/12V USB devices
Features: Portable Charger with Built in cables, multiports for multi devices charging
Package: 1 pc portable charger with built in cables
Stay Powered Anywhere: This 20K portable charger delivers 3-4 full phone charges – perfect for camping, flights, or emergencies. Fits easily in backpacks to keep devices alive through weekend trips, festivals, or work travel.
3-in-1 Built-in Cables: No more hunting for cables! Power bank Built in USB-C, Lightning and Micro-USB cables – simply plug in to charge instantly. It eliminates cord clutter while keeping all your devices powered anywhere. Never face a dead phone again!
Works with Virtually All Your Devices: Charge iPhones (all models), Samsung Galaxy/Pixel phones, iPads, AirPods, Kindles and most tablets with this universal power bank. No more carrying multiple chargers – one solution powers your entire tech life.
22.5W PD Fast Charging – 50% in 30 Minutes!: Get a 50% charge faster than you can finish your coffee break. Perfect for emergency power before meetings or when rushing out the door.
Exact Battery % – No More Guessing Games: Unlike basic 4-light indicators, the digital display shows precise remaining power (0-100%) – just like your phone’s battery icon.Never get stranded with sudden dead power again
Your Personal Charging Station – 6 Devices at Once!: 6 Outputs! Power your phone, tablet, earbuds and smartwatch simultaneously – no more choosing which device gets charged first. Perfect for professionals with multiple gadgets.
Double the Power, Only 35% Heavier: Battery pack 20,000mAh (2X capacity of standard chargers) in just 6.3 x 2.85 x 0.72 in – only 35% heavier than 10K models but holds twice the energy. Fits anywhere a paperback book would.
Flight-Friendly Portable Power: This power bank meets all airline safety standards, making it the perfect travel companion. Always pack in your carry-on (never checked bags).
What will you get: 1 x power bank, 1 x use manual, 1 x travel pouch. 24 Month’s support and lifetime technical support.
