The Fit's got tidy little touches to make its curves possible, including a slightly arched battery that snuggles right up against the plastic casing. It also somehow manages to fit seven chips onto its wee motherboard, if you were wondering how such a small package manages to track such a wide variety of experiences.
For those curious about repairability, it's actually not as grim as you might have thought given how specialised the package is. The most important bonus? You can replace the battery yourself, ensuring usability that will last far beyond your interest in your novelty wearable. Check out iFixit for the full gory details. [iFixit]