Belkin introduces ultra-slim semi-solid-state power banks with longer capacity retention

Belkin has launched two new semi-solid-state power banks that are notably slimmer and more efficient, signalling a shift towards solid-state battery integration in mainstream mobile accessories for enhanced capacity retention and design.

Belkin has moved semi-solid-state battery technology into the mainstream with two new power banks that are both slimmer than typical models in their class and designed to hold their capacity for longer. The launch, first shown at IFA Berlin 2026, places the accessories maker alongside a small group of brands pushing beyond conventional lithium-ion packs, according to TechRadar’s reporting from the show.

The smaller model, the UltraCharge Pro Slim Magnetic Power Bank with BoostSolid Cell, carries 5,000mAh of capacity in an 8.8mm body that Belkin says is around 40% thinner than comparable 5,000mAh rivals. It supports Qi2-certified 15W magnetic wireless charging, 22.5W USB-C wired charging and pass-through charging, while Belkin says the cell should retain most of its capacity after 1,000 charge cycles.

Belkin’s larger UltraCharge Pro 10,000mAh unit is built for more demanding use. The company says it can deliver up to 60W through USB-C, charge up to three devices at once through two USB-C ports and one USB-A port, and show battery, temperature and charging data on a small display. Belkin also claims it is 27% smaller than standard 45W 10,000mAh power banks, despite its higher output and extra ports.

TechRadar’s hands-on review noted that both products feel well built and unusually slim, with the 5,000mAh model standing out for its compact magnetic design and the 10,000mAh version offering a useful display and enough power for many modern phones. Belkin has priced the smaller pack at £59.99 and the larger one at £69.99, with sales due to begin this month through Belkin’s website, Amazon and selected retailers.