Tested: INUI 10,000mAh Slim Fast Charge 22.5W Power Bank review

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To ensure festival-goers receive reliable advice, we have thoroughly tested the INIU 10,000mAh Slim Fast Charging Power Bank 22.5W. Our team purchased and used this power bank over the past few weeks. It underwent real-world testing and precise capacity testing with professional equipment. The power bank excels as a companion for day festivals and short events, providing a sleek balance of portability and sufficient power supply. Our hands-on experience informs our practical review, going beyond mere specifications.

Product Overview

The newest slim fast charging power bank from INIU is a compact yet powerful device, boasting a 10,000mAh capacity. It can fully recharge almost any smartphone, leaving a decent amount of charge remaining, or provide approximately 70% battery to two phones if shared. This power bank is specifically designed for day festivals and shorter events, offering a balance between ample power and portability.

This compact power bank delivers impressive performance with its 22.5W fast charging capabilities. Equipped with PD 3.0 & QC 4+ technologies, it efficiently charges a variety of devices, including the latest iPhones and other USB-C enabled gadgets.

The standout feature of this device lies in its design. It is incredibly thin and lightweight, combining functionality with portability flawlessly. Its sleekness allows for effortless pocket or small bag storage, making it an ideal companion for minimalist festival-goers who prioritize convenience.

Design and Portability

The INIU 10,000mAh power bank is a compact and lightweight device, perfect for festivals. It measures 5.3×2.8×0.6 inches and weighs only 210 grams, making it easy to carry in your pocket or bag.

The power bank’s design is simple and practical, but its standout feature is a compact plastic stand. This thoughtful addition lets users prop their phones in landscape mode, making it convenient for watching videos or taking group photos. This unique feature sets it apart from other power banks in the market.

The primary focus of this power bank’s design lies in its practicality and user-friendly features, making it an ideal option for festival attendees seeking a straightforward and efficient charging solution without extra bulk.

Charging Capabilities

The INIU 10,000mAh power bank stands out for its efficient charging abilities, boasting a 22.5W fast charging output. This is made possible by the advanced PD 3.0 (USB Power Delivery) and QC 4+ (Quick Charge) technologies. The USB-C port supports fast charging via USB Power Delivery, ensuring compatibility with iPhones and most Android phones and delivering a notable speed advantage. For quick iPhone charging, it’s crucial to employ a USB-C to Lightning cable, as standard USB ports will only charge at regular speed.

You can use Google to verify if your Android phone supports fast charging through standard USB ports using Quick Charge. All ports on the power bank provide a decent charging speed of 5V 2A, but to fully utilize fast charging, it’s crucial to use the correct port and cable combination.

The power bank has a 10,000mAh capacity, allowing it to fully charge a standard smartphone and retain extra power. Alternatively, it can provide approximately 70% charge to two phones, making it ideal for sharing. Its combination of speed and capacity makes it a dependable power source for festival-goers, ensuring their devices stay charged all day.

Efficiency and Performance

When a power bank is fully charged, it usually provides approximately 75% to 80% of its stated capacity. So, a 10,000mAh power bank would typically deliver around 7500 to 8000mAh to your device. However, the efficiency of the device being charged also matters. For example, if your phone has a 5,000mAh battery, it may need around 6,000mAh of input to reach a full charge, accounting for its own charging inefficiencies.

The INIU 10,000mAh power bank stands out with an impressive output efficiency of 82.2% in this scenario. It effectively provides 8215mAh of power before depleting, exceeding standard expectations. This high efficiency is especially beneficial for festival-goers who require a power bank to support their devices during extended days of music, socializing, and frequent phone usage.

The power bank’s remarkable efficiency enables it to charge a smartphone multiple times, which is crucial in festivals where power sources are limited. Our thorough testing, using professional-grade equipment, confirms the INIU power bank’s outstanding performance, making it an excellent option for day-long festivals and short events.

Compatibility and Features

The INIU 10,000mAh power bank is highly compatible with a wide variety of devices. Its versatile design meets the diverse charging needs of modern technology, making it an ideal choice for festival-goers.

The USB-C port is a prominent feature that supports USB Power Delivery, enabling fast charging for iPhones and most Android phones. Moreover, the standard USB ports are compatible with Quick Charge technology, beneficial for specific Android models. The power bank’s dual compatibility ensures efficient charging for any device type.

The adaptability of the power bank to various charging needs is another crucial aspect. It incorporates an automatically-adjusted trickle-charging mode specifically designed for smaller devices such as AirPods or smartwatches. This mode guarantees optimized power delivery to these devices while safeguarding battery health.

The INIU power bank is notable for its capacity to charge several devices at once, making it particularly useful for festivalgoers who require simultaneous charging of their phone and a Bluetooth speaker, or for those who need to keep two phones powered throughout the day.

The INIU 10,000mAh power bank is an extremely practical accessory for any festival setting. Its wide compatibility and thoughtful features ensure you remain connected, regardless of the device you have.

Practicality for Festival Use

The INIU 10,000mAh power bank is perfect for day festivals, gigs, and other short events that prioritize portability. With its compact and lightweight design, you can easily carry it around without the hassle of heavy gear, allowing you to fully enjoy the event.

The power bank’s capacity is ideal for a full day outing. It can fully charge your smartphone once and still have enough power for an additional partial charge. This is great for day-long events when you need to capture moments, navigate, and stay connected without high power demands that would arise over several days.

See Also

The power bank is great for day use but may not be enough for longer festivals or camping. It’s not recommended to recharge it from a larger power bank unless you have extra power to spare due to efficiency losses. It’s better to combine it with a larger model or use it as a supplementary power source for optimal efficiency.

The power bank is durably constructed to withstand the wear and tear commonly encountered in festival environments, including jostling in crowds and enduring unpredictable weather. It is designed to handle the challenges of festival life.

To summarize, the INIU 10,000mAh power bank is exceptionally convenient for brief occasions, providing an ideal balance of power, portability, and durability to ensure continuous connectivity and engagement throughout the day.

Warranty and Support

The INIU 10,000mAh power bank stands out due to its attractive warranty and support package provided by INIU. With an impressive 3-year warranty and lifetime technical support, INIU demonstrates their confidence in the product’s durability and quality.

The INIU package contains a USB C cable, a travel pouch, and a user manual. The inclusion of the travel pouch adds an additional layer of protection and enhances portability, making it ideal for carrying the power bank during festivals.


The INIU 10,000mAh Slim Fast Charging Power Bank offers a perfect combination of portability, capacity, and efficiency. With its slim, lightweight design and 10,000mAh capacity, it’s an excellent option for day festivals, gigs, and short-duration events. Equipped with advanced charging capabilities supporting PD 3.0 and QC 4+, this power bank delivers fast and efficient charging for various devices.

Based on our tests, this product surpasses the usual efficiency standards by providing an 8215mAh output, outperforming many similar competitors. This makes it a dependable accessory for festival attendees requiring sustained device power. However, for lengthier festivals or camping trips, it’s advisable to combine it with a higher capacity power bank or utilize it as an additional power source.

The industry-leading 3-year warranty and lifetime technical support provided by INIU add even more value to this power bank, ensuring peace of mind and dependable assistance.

To sum up, the INIU 10,000mAh power bank is an excellent option for individuals in search of a small, effective, and dependable charging solution for brief outdoor gatherings. It caters to the requirements of festival attendees, guaranteeing seamless connectivity and power without any additional concerns.

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