I have tested dozens of MagSafe battery packs over the years, including slim ones, chunky ones, low-capacity chargers, and full-on power bricks that aim to replace everything at once. Most of the battery packs I test are mostly fine; they do the job. But the Kuxiu S3 10,000mAh battery pack strikes a great balance of simplicity, multifunctionality, and, most importantly, reliability. Here is what you should know about their brand-new solid-state battery pack. Check out the hands-on video below: S...