Summer stretches the limits of your phone. Beaches and pools threaten to waterlog it, while far-off locales and day-long excursions provide few outlets to resuscitate an ailing battery. Your peace of mind: the Mophie Juice Pack H2Pro. The iPhone 6 case features not only a 2,750mAh battery good for refueling a fully-depleted phone at least once, but also a military-approved, seam-welded design that survives dust, drops, splashes, and even 30 minutes of submersion in up to four feet of water. $130; mophie.com
It defends against water, dirt, drops, and battery depletion.