Kuxiu’s new S4 MagSafe battery packs a 10,000 mAh capacity into a 13.5 mm chassis, making it the thinnest 10,000‑mAh semi‑solid‑state pack on the market. The unit supports 25 W wireless and 30 W wired charging, and its aluminum‑glass body feels premium.

The standout feature is a TFT display tucked into the kickstand. It cycles through battery health, temperature, and real‑time wattage, alerting users instantly if safety thresholds are breached. In practice, the pack delivers a 50 % charge to an iPhone 17 Pro in about 20 minutes, and can top up an iPad Pro at full 30 W.

Strong dual‑sided MagSafe magnets keep the pack attached even under tight jeans, and a low‑power mode lets users trickle‑charge accessories like AirPods. At $84, the S4 offers a compelling mix of power, portability, and diagnostics, positioning Kuxiu as a serious contender in the mobile‑power arena.

Consumers seeking a lightweight, feature‑rich backup for flagship phones will find the S4 a solid choice, especially given its competitive price and robust build quality.