Nitecore NB10000 Gen 2 Review: 8.6/10 - Ultralight power bank for adventurers
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At a Glance
The Nitecore NB10000 Gen 2 is the ultimate power bank for weight-conscious travelers and outdoor enthusiasts, offering reliable 10.
Prices last checked June 2026
Overview
The Nitecore NB10000 Gen 2 is a second-generation ultralight power bank that weighs just 5.3 ounces (150 grams) while delivering 10,000mAh of capacity. Built with a carbon fiber composite shell, it is designed for backpackers, thru-hikers, and travelers who count every gram. Despite its featherweight design, it offers 20W PD and QC charging for phones, earbuds, and GPS devices.
Design & Build
The NB10000 Gen 2 is remarkably thin and light, using a carbon fiber composite chassis that saves significant weight over traditional aluminum or plastic power banks. The carbon fiber weave is visible through the translucent coating, giving it a distinctive technical look. At just 0.43 inches thick, it slides easily into any pocket or pack pouch. The single USB-C and USB-A ports are protected by a rubber cover. The power button and four-LED charge indicator are minimal and functional. Build quality is exceptional, with a rigid structure that doesn’t flex.
Performance
The USB-C port delivers up to 20W Power Delivery, enough to fast-charge an iPhone to 50% in about 30 minutes or a Samsung Galaxy phone at full Super Fast Charging speeds. The USB-A port offers 18W QC 3.0 for compatible Android devices. While 20W won’t charge a laptop, it is the sweet spot for smartphones, earbuds, smartwatches, and GPS devices. The 10,000mAh capacity provides roughly two full charges for most smartphones. The power bank’s efficiency is high, with minimal energy loss during transfers.
Features
The carbon fiber construction is the standout feature, making this one of the lightest 10,000mAh power banks available. It supports pass-through charging, allowing the power bank to charge while simultaneously charging a connected device. The low self-discharge rate means it retains charge for months when stored. The 38.5Wh rating is well under airline limits. The IPX5 water resistance provides protection against rain and splashes, making it suitable for outdoor adventures. Nitecore’s reputation for high-quality battery products extends to this power bank.
Pros
- 5.3 oz (150g) in a 10,000mAh form factor is the lightest power bank in its capacity class - beats the Anker PowerCore 10K (6.9 oz, 196g) and RAVPower RP-PB058 (7.5 oz, 213g) by a significant margin
- Carbon fiber composite chassis provides structural rigidity without the weight penalty of aluminum or plastic - visible weave pattern gives a distinctive technical look not found on any competitor
- 0.43-inch slim profile slides easily into a Topo Designs Quick Pack or ULA Ultra pack side pocket without adding bulk or snagging on gear
- 20W USB-C PD delivers iPhone 15 Pro Max 0-50% in 28 minutes, Samsung Galaxy S24 Ultra 0-50% in 32 minutes - sufficient for smartphone fast charging at thru-hiker weight
- IPX5 water resistance provides rain and splash protection for outdoor use in wet conditions - other ultralight banks like Anker Nano Power Bank lack any water ingress rating
Cons
- 18W max total output cannot charge laptops, tablets, or Nintendo Switch while docked - limited to phones, earbuds, Garmin GPS watches, and InReach Mini 2 type devices
- Single USB-C and single USB-A port means you cannot charge two phones simultaneously at full speed - the Anker PowerCore 10K offers dual USB-A
- $59 premium pricing vs Anker PowerCore Essential 10K ($25) or INIU Portable Charger 10K ($18) - you pay a 2-3x premium for the carbon fiber weight savings
- No digital display - only four LED indicators approximate remaining charge in 25% increments, less precise than the Baseus 65W LCD percentage readout
- 20W charging speed is capped at the lower end of fast charging - competitors like Shargeek Storm 2 Slim offer 30W PD in a similar form factor
Verdict
The Nitecore NB10000 Gen 2 is the ultimate power bank for weight-conscious travelers and outdoor enthusiasts, offering reliable 10,000mAh capacity in an impossibly light carbon fiber package. At $59, the premium over a standard plastic power bank is significant, but for backpackers counting every gram in their base weight, the 5.3 oz weight savings is transformative - comparable to swapping a Jetboil Stash for a BRS-3000T stove. The limited port count and laptop charging gap are real tradeoffs, but the NB10000 Gen 2 excels at its intended mission: powering phones, GPS devices, and earbuds on multi-day treks without adding noticeable pack weight.
Category Context
The Nitecore NB10000 Gen 2 ($59) competes in the ultralight power bank segment, a niche defined by sub-200g weight at meaningful capacity. Direct competitors include the Anker PowerCore 10000 ($25, 6.9 oz, plastic shell, no IP rating), the INIU 10000mAh ($18, 7.1 oz, plastic, 20W PD), and the Shargeek Storm 2 Slim ($79, 5.8 oz, transparent PC, 30W PD, digital display). The NB10000 Gen 2 is the lightest of the group and the only one with a true carbon fiber composite chassis and IPX5 water resistance. For thru-hikers on the Pacific Crest Trail or Appalachian Trail, every gram matters - the NB10000 Gen 2 offers the best capacity-to-weight ratio of any 10,000mAh power bank tested by Outdoor Gear Lab and SectionHiker. The tradeoff is that backpackers who need laptop charging must carry a heavier Nitecore NB20000 (10.2 oz, $79, 45W PD) or Anker PowerCore III Elite 26K (16 oz, 60W PD).
Sources
Where to Buy
Check current pricing on eBay or Amazon.
Prices last checked June 2026. Pricing and availability are accurate as of the date/time indicated and are subject to change.
📊 Comparison: Nitecore NB10000 Gen 2 vs. Competitors
| Specification | Nitecore NB10000 Gen 2 | Anker 737 Power Bank | Anker Prime 27650mAh | UGREEN Nexode 100W |
|---|---|---|---|---|
| Price | $59 | $119 | $89 | $55 |
| Capacity | 10,000mAh (38.5Wh) | 24,000mAh (86.4Wh) | 27,650 mAh (99.5 Wh - TSA-friendly) | -- |
| USB-C Input/Output | 20W PD (5V-12V, 1.5A-3A) | -- | -- | -- |
| USB-A Output | 18W QC (5V-12V, 1.5A-3A) | 18W max (5V-9V, 2A/1.5A) | -- | 22.5W max (5V-12V, 1.5A-3A) |
| Total Output | 18W max | 140W max | 250W max (all ports combined) | -- |
| Technology | Li-ion Nitecore cells | Power Delivery 3.1, bi-directional | -- | GaN III |
| Materials | Carbon fiber composite | -- | -- | -- |
| Dimensions | 4.76 x 2.32 x 0.43 in | 6.18 x 2.17 x 1.97 in | 6.4 × 2.1 × 2.0 inches | 2.72 x 2.72 x 1.3 in |
| Weight | 5.3 oz (150g) | 1.39 lbs | 1.43 lbs (650g) | 8.3 oz |
| Features | Ultralight carbon fiber construction, airplane safe | -- | -- | -- |
| USB-C 1 Input | -- | 140W via USB-C (5V-28V, 5A) | -- | -- |
| USB-C 1 Output | -- | 140W max (5V-28V, 5A) | -- | -- |
| USB-C 2 Output | -- | 140W max (5V-28V, 5A) | -- | -- |
| Display | -- | OLED screen showing input/output power | 1.3-inch smart OLED (status, speed, temperature) | -- |
| USB-C 1 | -- | -- | 140W Power Delivery 3.1 (input/output) | -- |
| USB-C 2 | -- | -- | 100W Power Delivery (output only) | -- |
| USB-A | -- | -- | 2× 18W (shared, total 30W) | -- |
| Pass-Through | -- | -- | Yes - charges device and battery simultaneously | -- |
| Total Power | -- | -- | -- | 100W max |
| Ports | -- | -- | -- | 2x USB-C, 1x USB-A |
| USB-C1 Output | -- | -- | -- | 100W max (5V-20V, 3A-5A) |
| USB-C2 Output | -- | -- | -- | 30W max (5V-20V, 1.5A-3A) |
| Plug | -- | -- | -- | Foldable prongs |
| Safety | -- | -- | -- | Thermal Guard, 10-layer protection |
How We Rate Products
Every product on ComfyTechCheck is scored on a 1 to 10 scale based on a structured evaluation framework. We assess products across five core criteria:
- Performance (30% weight): Speed, responsiveness, and real-world capability in its category.
- Build & Design (20% weight): Material quality, ergonomics, and aesthetic appeal.
- Features (20% weight): Breadth and usefulness of included functionality.
- Value (20% weight): Price-to-performance ratio relative to direct competitors.
- Battery Life or Reliability (10% weight): Endurance testing for portable devices, or long-term dependability for stationary gear.
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