Backside Line
The Nitecore NB Air is a standout small-capacity energy financial institution for fast overnights and day-to-day use. It’s significantly interesting for ultralight backpackers as a consequence of its extremely mild and compact design that disappears in a pack or pocket. It’s additionally constructed to final with rounded corners, a strong carbon fiber body, and an IPX7 waterproof ranking. All in all, we discovered it very handy for fast telephone top-offs whereas mountain climbing, backpacking, and working errands round city.
The machine’s small measurement and low weight do include some trade-offs, together with restricted capability, no pass-through charging, and just one USB port. We additionally noticed a big lower in effectivity when uncovered to chilly temperatures. Lastly, like most ultralight gear, the NB Air comes at a little bit of a premium price-wise. However for ounce-counters used to creating these concessions, the NB Air is a well-engineered financial institution that will get the job achieved.
How We Examined
We introduced the Nitecore NB Air on day hikes round Durango, Colorado, an in a single day snowshoe journey in southwest Colorado, and a backpacking journey within the Southwest. We additionally used it as a every day driver whereas working errands round city and charging units at dwelling to get a superb really feel for its all-around efficiency.
Fast Specs
Nitecore NB Air
Greatest 5,000 mAh Energy Financial institution
CleverHiker Score:
4.7/5.0
Worth:
$40
Weight:
3.1 oz.
mAh:
5,000
Time to full cost:
1 hr 38 minutes
Execs
- Ultralight
- Compact measurement
- Quick recharge time
- Contact-sensitive energy indicator
Cons
- Just one charging port
- Restricted options
- Decreased effectivity in chilly climate

Effectivity
Regardless of being on the small finish by way of capability (5,000 mAh), the Nitecore NB Air is fairly environment friendly. To check this, we used a dummy resistor load and multimeter to measure accessible energy inside every energy financial institution. The NB Air had about 16 watt-hours accessible, which is a couple of lower than marketed (19.4 Wh) however not out of the norm. Importantly, the NB Air nonetheless scored above common by way of watt-hours per gram, that means it packs a substantial punch for its low weight.
Within the discipline, we had been sometimes in a position to get two partial telephone prices out of the NB Air utilizing an iPhone 15 Professional. We don’t often let our telephone go lifeless, nor will we cost it to 100%. Nevertheless, the proportion enhance throughout two prices appeared fairly near Nitecore’s marketed single telephone cost.

Weight & Portability
One among our favourite qualities of the Nitecore NB Air is how small and compact it’s, making it very simple to make use of on the go. On our kitchen scale, it got here in at simply 3.1 ounces. dimensions and whole quantity, the machine is extraordinarily compact and pocket-friendly. Totaled up, the NB Air ranked on the prime of our testing group for each weight and portability, making it a terrific possibility for weight-conscious customers like thru-hikers and ultralight backpackers.
In observe, the NB Air grew to become a go-to alternative for in a single day backpacking journeys and working errands round city. It’s simple to stash it in a handbag or fanny pack. On backpacking journeys, it matches into even the smallest of hipbelt pockets for on-the-go charging. It was equally simple to stash in pants pockets – and there’s no sagging or falling down because the machine is so mild (this wasn’t the case with bigger, higher-capacity banks we examined).

Sturdiness
An IPX7 ranking, rounded corners, and a carbon fiber body all contribute to the Nitecore NB Air’s strong sturdiness. The machine emerged from our eight-foot drop take a look at with no points or noticeable injury. The IPX7 ranking means it’s designed to face up to submersion as much as one meter (3.3 ft) for half-hour. That doesn’t imply you need to go dunking it on objective, however we’ve no issues about it withstanding rainstorms, humidity, and even the occasional drop in a puddle.
Upon shut inspection, there are a couple of faint scratches from use, however that’s purely beauty. A mud ranking can be good, and a few Nitecore customers have had points with longevity, however we’ve had a largely optimistic expertise with the NB Air. It looks like it’s powerful sufficient to face up to common out of doors use, which isn’t at all times the case with ultralight gear.

Charging Pace
Unsurprisingly, the 5,000 mAh Nitecore NB Air prices very quick. For reference, it took one hour and 37 minutes for the machine to go from 0% to 100%, which was the quickest time amongst these we examined. Importantly, the NB Air was the one 5,000 mAh possibility in our lineup, so it’s not precisely an apples-to-apples comparability.
The quick recharge time is admittedly useful whenever you’re in a rush – assume fast resupplies on the town or packing for a last-minute journey. Greater than as soon as, we’ve discovered ourselves charging our energy banks within the automobile between two backpacking loops. Although restricted by way of capability, the NB Air’s fast turnaround time is definitely useful.

Options
The Nitecore NB Air is a reasonably easy energy financial institution and not using a ton of options. As a result of it solely has one port, it’s not in a position to assist pass-through charging – that’s, the flexibility to cost whereas additionally powering a tool. It additionally forgoes bells and whistles generally discovered on larger-capacity banks, comparable to lanyard-style charging cords, built-in lights, and digital battery indicators.
One characteristic value calling out is the touch-sensitive energy “button.” Instead of a typical button, the machine has an engraved energy image that you just faucet to activate. Nitecore has obtained flack prior to now for points with inadvertent energy biking as a consequence of unintended presses, and the brand new button appears to resolve that downside. Rounding out the design is an analog cost indicator that’s pretty simple to learn on the go.

Chilly Effectivity
The Nitecore NB Air carried out under common in our chilly effectivity take a look at. To gauge this, we replicated our normal effectivity take a look at within the fridge. Evaluating the info, the NB Air skilled an 8% loss in accessible energy when uncovered to chilly temperatures – which may be very important contemplating the financial institution’s already-small capability.
In observe, customers might wish to take added precautions when adventuring within the chilly. This might imply retaining the ability financial institution near your physique or inside a sleeping bag. We saved the NB Air within the footbox of our sleeping bag on our in a single day snowshoe journey, and it dealt with the outing simply effective. So long as you’re conscious of the drop in effectivity, there are methods to mitigate it.

Ought to You Purchase the Nitecore NB Air?
The Nitecore NB Air’s low weight, small measurement, and good effectivity make it a terrific alternative for weight- and space-conscious customers like thru-hikers, minimalist backpackers, and vacationers. It’s additionally nice as an emergency backup or for supplementing a bigger energy financial institution on longer journeys.
On the flip aspect, the NB Air is on the pricier finish for its capability and is slightly low on options. Most notably, it doesn’t assist pass-through charging and solely comes with one USB port. Lastly, it carried out below-average in our chilly effectivity take a look at, which winter campers might wish to have in mind.

What Different Energy Banks Ought to You Take into account?
For those who just like the NB Air, you must also try the fashions under and check out our information to one of the best energy banks.
Nitecore NB10000 Gen4 Evaluation: The Nitecore NB10000 Gen 4 is actually a barely bigger, upgraded model of the NB Air. It presents a lift in capability in addition to higher effectivity and added options, together with pass-through charging, a number of USB ports, and even RGB lights across the retailers. The NB Air is lighter, extra moveable, and faster to cost.
Aim Zero Flip 24 Evaluation: The Flip 24 is one other small-capacity (6,700 mAh) energy financial institution for fast overnights or on-the-go use. The Flip tacks on pass-through charging and a flip-out USB plug, each of which the NB Air lacks, though it’s much less environment friendly than the Nitecore.
FLEXTAIL Zero Energy 10000 Evaluation: The Zero Energy presents a lift in capability in comparison with the NB Air whereas nonetheless being very light-weight and compact. It additionally comes with a lanyard-style USB-C twine, twin USB ports, and pass-through charging capabilities – at the next worth level.

