IP67 Sealed, Drop-Tested Shell
This is the reason to buy it. The IP67 rating means the bank is fully sealed against dust and can be submerged for up to 30 minutes at a depth of 1 meter, which covers rain, a dropped paddle-bag and a fall into a stream. Inside the hard shell, the lithium-ion cells are wrapped in a silicone cushion to damp vibration and shock, and Elecom says the design is tested to the US military MIL-STD 810G 516.7 drop test. Those two things together address the ways ordinary power banks die outdoors. The charging ports sit under a water-resistant cap, which one owner singles out, and as with any capped design the seal only works when the cap is fully closed, so make a habit of checking it before the bank goes anywhere wet, and dry around the cap before opening it. Quality and durability are the themes this bank is most praised for, and more than one owner remarks on how much smaller it is in hand than the box suggests.
