Kuxiu has launched the S2 Qi2 5000mAh MagSafe Solid-State Power Bank, featuring a semi-solid state battery for enhanced safety and longevity. Priced at $79.99, it supports Qi2 for 15W wireless charging and can charge the latest iPhone models fully at least once. The S2 is designed to last 1,000 charging cycles, offering a longer lifespan compared to traditional power banks.
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Kuxiu has launched the S2 Qi2 5000mAh MagSafe Solid-State Power Bank, which features a semi-solid state battery technology. Priced at $79.99, the power bank is designed to offer increased safety and longevity compared to traditional Lithium-ion alternatives, though it comes at a higher cost.
The S2 power bank supports Qi2 wireless charging with a capacity of 5,000mAh (19Wh), sufficient to fully charge the latest iPhone models from zero to full at least once. Despite the use of the term "solid state" in its name, Kuxiu clarifies that the device utilizes a semi-solid state battery, which includes a mixture of solid and liquid electrolytes forming a gel-like consistency.
The battery industry uses various terms to describe solid-state batteries, including all-solid state, semi-solid state, and quasi-solid state. The classification depends on the amount of liquid present in the electrolyte. A semi-solid state battery typically contains between 5 to 10 percent liquid electrolyte by weight, while an all-solid state battery contains none. The S2's battery fits the semi-solid state category as it includes a solid-liquid mixed electrolyte.
The power bank's label lists "Li Polymer Battery," which may seem contradictory. However, solid electrolytes in solid-state batteries can be made from materials such as ceramics and polymers. Therefore, the S2 can be accurately described as a Li Polymer battery that also qualifies as semi-solid state.
Traditional Lithium-ion batteries, commonly found in power banks, contain over 25 percent liquid, making them more susceptible to leakage and thermal issues. While the S2 does not achieve the highest energy densities and safety levels possible with all-solid state batteries, it represents a step towards improved battery technology. Kuxiu's power bank is mass-produced using existing manufacturing methods, which helps manage costs.
According to Kuxiu, the S2 can endure 1,000 charging cycles before its capacity reduces to 80 percent, compared to the 300–500 cycles typical for standard 5,000mAh power banks. Although it costs about 60 percent more than liquid-based alternatives, the S2's extended lifespan may offer better long-term value.
The S2 is compact and lightweight, measuring 10.4 x 6.7 x 1.0 cm and weighing 145g. It offers 15W wireless charging and includes a USB-C port for wired charging, supporting devices up to 20W. The power bank can charge both Qi2 and non-Qi2 devices and features a low-current mode for charging smaller gadgets.
A notable design feature includes 16 N52 magnets that secure the power bank to MagSafe-compatible devices. However, the positioning may extend beyond smaller phone models, affecting symmetry. The S2 is available in black and titanium colors.
While the S2 does not include a kickstand, which some competitors offer, its design focuses on durability, featuring an aluminum body with Corning Gorilla Glass protection and an "explosion-proof film."
The Kuxiu S2 Qi2 5000mAh MagSafe Solid-State Power Bank presents an advancement in power bank technology with its semi-solid state battery. Despite a higher initial cost, its potential for longer lifespan and improved safety may appeal to consumers seeking durable and reliable charging solutions.