Nitecore NB Air

The Nitecore NB Air is an ultralight power bank weighing just 89g, built on a carbon-composite frame that makes it one of the lightest 5,000mAh power banks on the market. An IPX6 rating gives it solid protection against splashing and pressurized water, useful for rain or stream crossings. A single USB-C port handles both input and output up to 18W, so the NB Air works as a bidirectional charger without requiring separate cables for different connectors. The trade-off is no pass-through charging — you can't recharge the bank and top up a phone from it at the same time. At 5,000mAh, it's good for roughly one to two full phone charges, and at under 100g that makes the NB Air one of the more efficient options for ultralight trips where every gram in the pack matters.