The external batteries o Powerbank have become an essential accessory for any mobile device user. Our dependence on smartphones, tablets, or gadgets like cameras, MP3 players, or Bluetooth speakers forces us to look for solutions when we don't have access to a power outlet. In this context, the EasyAcc Monster 20000 mAh It stands out as one of the most complete and reliable alternatives for those who need extra energy during trips, camping, excursions, or long work days away from home.
The portable battery market has evolved thanks to the growing demand for power and charging security. The EasyAcc Monster responds to this with a combination of High capacity, multiple ports, fast charging and advanced featuresBelow, you'll discover all its features, unique advantages, and tips for getting the most out of this essential device in any tech backpack.
Technical features and main advantages of the EasyAcc Monster 20000 mAh
- Total capacity: 20000 milliamps (mAh), allowing you to charge a conventional smartphone (2500 mAh) up to 7-8 times before the external battery runs out.
- 4 USB output ports: allow charge up to four devices simultaneously, be it a smartphone, tablet, e-reader, wireless speaker, camera or any USB device.
- Dual Micro USB input port: faster recharging of the power bank itself (accepts up to 4A in total if you use both ports at the same time), reducing charging time to about 6 hours, 50% less than single-input models.
- Maximum total output: 4.8A, with intelligent device detection to automatically adjust the optimal charging speed and protect each gadget's internal battery.
- Built-in Bright LED Flashlight: Very useful in emergency situations, power outages, or nighttime activities. It is activated and deactivated by double-pressing the power button.
- universal compatibility: Charges Android smartphones, iPhones, iPads, tablets, digital cameras, e-books, headphones, and any device that accepts USB charging.
- Advanced security systems: Protection against overload, short circuits, overheating, and overcurrent. CE, RoHS, and FCC certified.
- High quality A+ Li-ion battery: life cycle of up to 500 full charges, ensuring years of use without significant loss of capacity.
- LED charge level indicators: 4 LED lights showing the percentage of remaining power (100%, 75%, 50% and 25%).
- Dimensions and portability: Despite its high capacity, its dimensions (approx. 16,7 x 8 x 2,2 cm) and a weight of about 454 grams allow it to be carried in a backpack, handbag or even in a large pocket.
Why does the EasyAcc Monster 20000 mAh stand out from other power banks?
One of the most notable differences with respect to other models is, without a doubt, the sum of capacity, speed and multitasking functionalityNot all power banks on the market can charge four devices at once without reducing the charging speed per port. For more information on other models, you can visit our guide. The best external batteries for mobile phones in 2025.
- Ideal for families, travel groups or users with multiple gadgets: You can charge your phone, tablet, smartwatch, and Bluetooth headphones at the same time—no need to wait in line.
- Double entry for accelerated recharging: The ability to use two Micro USB cables allows you to recharge the internal battery in record time, which is essential for those who need to have it ready for the next day.
- LED flashlight function: The built-in powerful flashlight adds extra value for camping, traveling, emergencies, or unexpected power outages. Activation is simple with a double click.
- advanced security: Internal systems protect both the power bank and connected devices from overvoltages, short circuits, and overheating, something that cheaper models don't always offer. For more tips, check out our article on Bugs that shorten battery life on Android.
- Robust construction and practical design: Although the appearance is simple, the quality plastic casing is sturdy and durable, something that users appreciate especially after months of intensive use.
Real-life user experience and featured reviews
The user ratings Independent tests agree that it's one of the best options on the market if you're looking for a battery with real capacity and advanced features. Some examples and situations where its performance has made a difference:
- On long trips, it has been confirmed that it can keep a smartphone active for a week without needing to charge the power bank. This is equivalent, for example, to charging a Galaxy S6 6-8 times, an iPhone 7 up to 6 times, or an iPad Mini 3 about twice.
- Overcurrent and overload protection have proven effective, preventing failures or breakdowns even when sensitive devices are connected.
- The size and weight, while larger than lower-capacity models, are well-proportioned and portable. Its form factor is comparable to a full-size phone like the iPhone 6s Plus, but thicker, so it fits in a backpack or everyday bag.
- In emergencies, especially during power outages or nighttime hikes, the LED flashlight becomes a valuable tool, providing enough light to navigate or work in adverse conditions.
- The smart charging system adapts the speed based on the type of device connected, achieving faster and more efficient charging compared to conventional chargers or computer USB ports. For more details, see our comparison. quality external batteries.
Many users emphasize that, even after dozens of charging cycles, the battery life barely suffers, confirming the quality of the internal cells used by EasyAcc. Furthermore, it's extremely easy to use: simply plug in your devices and press the button to start charging.
How to use the EasyAcc Monster safely and efficiently
The EasyAcc Monster 20000 mAh power bank is designed to be easy for anyone to use, but following a few tips will maximize its lifespan and ensure an optimal experience:
- To charge a device: Connect the USB cable from the power bank to the device and press the power button. The LED lights will show the available charging status.
- Charging the external battery: Use both input ports when you're in a hurry to fill it up completely. We recommend recharging it the night before if you're planning an extended trip.
- Charge level query: Each LED indicator represents 25% charge (1 light: less than 25%, 4 lights on: 100%).
- Flashlight Usage: Double-tap the power button to turn it on or off. This is useful for outdoor activities or low-light situations.
- Care and maintenance: Do not expose the power bank to water, extreme heat or strong impacts, and use quality cables to avoid premature deterioration of the connectors.
What's in the box and what are the official specifications?
- Package content:
- 1 x EasyAcc Monster 20000mAh Powerbank
- 2 x Micro USB Cables
- 1 x Multilingual User Manual
- Technical Specifications:
- Capacity: 20000 mAh / 74 Wh
- Battery type: Lithium Ion A+
- Input: DC 5V 4A (max, adding both ports)
- Total output: DC 5V 4.8A (max.)
- Dimensions: 167 x 80 x 22 mm
- Weight: approximately 454 g
Comparison and recommended uses
La EasyAcc Monster 20000 mAh It's well above average in terms of functionality and features for demanding users. While other lower-capacity models may be lighter, none match its real-world battery life, ability to charge up to four devices simultaneously, and dual fast charging function. If you'd like more information about other high-capacity power banks, don't hesitate to visit our section.
It is the preferred choice for:
- Frequent travelers, backpackers and families
- Professionals who spend the day outside the office
- Students who need power for lightweight laptops, tablets, and mobile phones
- Multi-gadget users (smartphones, headphones, smartwatches, cameras, etc.)
- Emergency situations, power outages or outdoor activities
The price is around 32 Euros, making them a very profitable investment due to the quality and peace of mind they offer, as they easily replace several conventional chargers. For more tips on battery maintenance, check out our article on .
The EasyAcc Monster 20000 mAh is a high-capacity, high-performance accessory designed to meet the mobile power needs of even the most active users. Whether you're going on a long trip, attending festivals, or as an emergency tool at home, this power bank ensures your electronic devices don't shut down at the most critical moment. If you've already tried it, we encourage you to share your experience in the comments section at the bottom of the page.
