Solid-state drives (SSDs) are a type of non-volatile storage that rely on NAND flash memory to store data without moving parts. At the core of an SSD are billions of memory cells arranged in a grid-like structure, with each cell capable of holding one or more bits of information depending on the NAND type (SLC for 1 bit per cell, TLC for 3 bits per cell, which is common in consumer SSDs).
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I’ll admit, having seen a prototype Pro Charger in person back in January, that it’s the prettiest way to re-juice a smart ring I’ve ever seen. Whereas Samsung and Oura have both opted for discreet, ring box-style hardware, Ultrahuman made something designed to sit on your nightstand. It’s not taking up space just for show, either, since it includes the aforementioned battery, LED charge indicator, speaker and haptics. It’s also got the ability to diagnose and address firmware issues to eliminate worries around firmware issues bricking devices.