Dark Energy Poseidon
Balancing portability and extreme power capacity, the Dark Energy Poseidon is the brand’s most rugged to date, and the one you’ll want to have with you off the beaten path. This backup battery boasts a 10,000 mAh reserve good for recharging most smartphones four to six times, even letting you charge two at once thanks to dual USB charging ports with a total 3.4 amp output (2.4A and 1.0A each) combined. The Poseidon will of course charge a variety of other devices as well and is also completely waterproof to IP68 standards, virtually indestructible with a MIL-STD-810G durability rating, features a built-in LED light, and includes a water-resistant cable that’s wrapped in 20 feet of paracord, just in case.
Grab one at Amazon in Black or Tealtree – $100