Mophie Powerstation Pro
For its pocket-friendly size, this rugged, impact- and splash-resistant battery packs a punch, with 6,000 mAh* of juice that powered up an iPad Mini from 10 to 95 percent in three-and-a-half hours. “It slides into the smallest of pack pockets thanks to its smartphone-size dimensions,” says a tester. Critique: Testers wished they had two USB ports to charge multiple devices. Great for shorter trips, as it does not recharge in the field. $100; 12.7 oz.; mophie.com
*mAh Milliampere-hour, a unit of electrical charge. Higher mAh means more juice to power your device.