Kuxiu has unveiled its latest portable battery, the S3, aiming to address previous criticisms and introduce significant upgrades. This new model builds upon the company’s earlier “semi-solid state” power bank, offering enhanced safety features and a host of user-friendly additions. The S3 promises a longer lifespan and improved performance, positioning itself as a compelling option in the crowded portable power market.

Despite marketing claims, the Kuxiu S3 is not a true solid-state power bank. It utilizes a hybrid electrolyte, a blend of solid and liquid components, which significantly reduces the risk of thermal runaway compared to traditional lithium-ion batteries. Kuxiu asserts this unique chemistry doubles the battery’s longevity, supporting approximately 1,000 charging cycles before capacity degrades to 80 percent.

While the initial purchase price of the 10,000mAh Kuxiu S3 may exceed that of conventional power banks, which typically last between 300 to 500 cycles, its extended lifespan offers long-term cost savings. The unit lists for $149.98 but is frequently available at a substantial discount, often falling below $70. This competitive pricing at the point of sale, coupled with its durability, makes it an economically sensible choice over time.

The enhanced safety aspect of the Kuxiu S3 warrants serious consideration, especially in light of recent recalls affecting major brands. Anker recalled over 481,000 units due to fire risks, and INIU faced a recall of 210,000 power banks linked to multiple fires and significant property damage. These incidents underscore the importance of prioritizing safety in portable charging devices.

Beyond its core safety improvements, the S3 boasts several practical enhancements. These include a robust folding metal kickstand for convenient device viewing, a clear digital display indicating remaining battery life and charging status, and a detachable USB-C cable that neatly integrates into the device’s perimeter. The power bank also supports faster 30W wired charging input and up to 25W Qi2 wireless output for compatible devices.

The Kuxiu S3 integrates strongly with MagSafe-compatible charging cases, thanks to a powerful array of 18 N52 magnets. These magnets ensure a secure and stable connection, even with the relatively substantial size and weight of the power bank. The digital display provides real-time information on battery percentage and charging progression, enhancing the user experience.

Measuring 106.9 x 71 x 22.15mm and weighing 245.3g, the S3 is considerably larger and heavier than many portable chargers. When attached to an iPhone 15 Pro, its bulk is noticeable, impacting pocketability. However, the strong magnetic grip effectively compensates for its size, maintaining a secure alignment for efficient charging.

Testing the S3’s 10,000mAh (38.5Wh) capacity revealed a useful output of 31.12Wh, achieving an efficiency of 80.83 percent. This performance is typical for devices in this category and allows for approximately one full charge of an iPhone 15 Pro, followed by a substantial partial charge, before the power bank is depleted.

The integrated, flat USB-C cable is a standout feature, offering unparalleled convenience by always being accessible. This eliminates the need to carry separate cables, a significant advantage for users who value preparedness. While not powerful enough to fully charge a MacBook Pro, it can extend its battery life by several hours.

Compared to its predecessor, the 5,000mAh S2 (available for $49.99), the S3 offers double the battery capacity, a battery percentage display, and enhanced charging capabilities, alongside the added convenience of a kickstand and integrated cable. Kuxiu’s semi-solid-state technology, combined with competitive pricing, presents a compelling value proposition, particularly for those prioritizing safety and longevity in their portable power solutions.

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Keywords: Kuxiu S3, MagSafe power bank, solid state battery, portable charger, Qi2 wireless charging, battery safety, long-life battery, USB-C cable