Physically, Booster 2.0i seems just about the right size for a 2000mAh battery. At 4” long, 2.3” wide, and 0.4” tall, it can easily slip into a pocket or bag. Made with a plastic exterior shell, it’s mostly matte with some glossy segments. Like most battery packs, it has a Micro-USB port for recharging, and a button next to a set of three lights, used to indicate the remaining charge. Along one of the short edges is a Micro-USB…
