Measuring 2.75” wide and deep, and a little less than 0.75” tall, Day Trip is the smallest of the bunch, and is easily pocketable. Although it’s clearly part of the same family as the Overnighter and Long Haul, it has features that help justify the relatively high price, at least partially. Chief among them are the attached cables, which hide along the side of the battery when not in use. The MFi Lightning plug will work with most cases, while…