I love MagSafe batteries and by this point, I have probably tested hundreds of them. There are plenty of great options out there with different capacities, charging speeds, built-in cables, and diagnostic displays, and there seems to be a MagSafe battery variant for any situation. But the feature I like most is thinness. While it’s great to have 10,000 mAh in a battery, that adds too much extra bulk in most daily cases. So over the last few months, I have been on the hunt for slim MagSafe batteries that add the least amount of bulk to my iPhone. These are the three best ones I’ve tested so far. If you want to see all of these in action, be sure to check out our video below! Kuxiu B10 Ultra Slim power bank The Kuxiu B10 is not the thinnest of the three we mention, but it is definitely the most well-rounded and possibly my favorite of the bunch. It will, of course, charge your phone via MagSafe, but it has a trick up its sleeve that I think every single MagSafe battery should implement.…