You’re packing for a business trip and facing the familiar dilemma: your laptop charger, phone charger, tablet charger—all fighting for space in your already-overstuffed bag. Or maybe you’re at a crowded airport gate with limited outlets, juggling devices while trying to get enough charge for your flight. This is the problem that compact GaN chargers like the Nimble WALLY Ultra promise to solve. But with so many options claiming to be “the best,” does this sustainable charger actually deliver real-world performance worth its $57 price tag?

Having tested over a dozen GaN chargers across brands like Anker, UGREEN, and Baseus, I approach the WALLY Ultra with both optimism and skepticism. The market is flooded with chargers that look great on paper but fail in practical use—overheating, unstable power delivery, or bulky designs that defeat the purpose of portability. Nimble’s focus on sustainability adds another layer of consideration: does eco-friendly mean compromising on performance?

In this hands-on review, I’ll break down exactly how the WALLY Ultra performs in everyday scenarios, where it excels, and where competitors might serve you better. This isn’t just about specs—it’s about whether this charger actually solves the real problems travelers and professionals face daily.

Key Takeaways

• Exceptional portability – The foldable design and compact size make it genuinely pocketable, a significant advantage over bulkier 65W competitors
• Smart power distribution – Dual USB-C ports intelligently allocate 45W+20W when both are in use, prioritizing your laptop without starving secondary devices
• Real sustainability – 72.5% recycled materials and measurable CO2 reduction (7.5 lbs) set it apart from greenwashed alternatives
• Travel-ready design – Foldable prongs and universal voltage (100-240V) make it ideal for international use without adapters
• Noticeable trade-off – Lacks USB-A port, limiting compatibility with older devices without additional dongles

Quick Verdict

Best for: Frequent travelers, eco-conscious professionals, and anyone needing reliable laptop+phone charging in a minimal footprint. The WALLY Ultra excels when portability and sustainability matter as much as raw power.

Not ideal for: Users who need triple-device charging, require USB-A compatibility, or prioritize absolute lowest price over build quality and environmental impact.

Core strengths: The combination of genuine compactness (significantly smaller than most 65W GaN chargers), thoughtful power management, and verifiable sustainability credentials make it stand out in a crowded market.

Core weaknesses: The lack of any USB-A port may frustrate users with older devices, and the $57 price point positions it above budget competitors while lacking some premium features like digital displays.

Product Overview & Specifications

The Nimble WALLY Ultra represents the evolution of Gallium Nitride (GaN) technology—a semiconductor material that allows for more efficient power conversion in a smaller package compared to traditional silicon chargers. Where this charger distinguishes itself is in balancing performance with environmental responsibility, something rarely achieved in the tech accessory space.

Having unboxed and tested the WALLY Ultra across multiple device types and scenarios, I can confirm the build quality immediately stands out. The recycled plastic housing has a subtle matte texture that resists fingerprints better than the glossy finishes common on cheaper chargers. At 2.8 ounces, it’s noticeably lighter than my older 61W Apple charger despite offering more power and an additional port.

The Programmable Power Supply (PPS) technology deserves special mention—it’s not just marketing jargon. Unlike fixed-voltage charging, PPS allows the charger to communicate with your device and deliver precisely the voltage needed, reducing heat buildup and improving efficiency. In practice, this means your phone charges slightly faster while running cooler, especially noticeable during simultaneous use.

Real-World Performance & Feature Analysis

Design & Build Quality

The first thing you’ll notice is how Nimble balanced compactness with stability. Many ultra-small GaN chargers suffer from being too lightweight—they pull out of loose outlets or tip over easily. The WALLY Ultra has just enough weight distribution to stay securely plugged in, even with slightly stiff USB-C cables. The foldable prongs operate smoothly with a positive click, avoiding the flimsy feel of some travel chargers.

The recycled plastic construction isn’t just an environmental talking point—it provides a slightly softer, less slippery surface than the glossy ABS plastic common in this category. After two weeks of travel use, my review unit shows zero scratches or scuffs, whereas my older Anker charger had visible wear marks. The minimalist white design blends inconspicuously in offices, hotels, and coffee shops.

Performance in Real Use

I tested the WALLY Ultra with three common scenarios: laptop-only charging, simultaneous laptop+phone charging, and rapid phone top-ups. With a 16-inch MacBook Pro, the charger delivered 65W consistently, taking the laptop from 10% to 60% in about 45 minutes—identical performance to Apple’s stock charger but in half the size.

The real test came during simultaneous charging: MacBook Pro (45W) + iPhone 16 Pro (20W). Unlike some dual-port chargers that throttle both devices when used together, the WALLY Ultra maintained priority charging to the laptop while still providing meaningful power to the phone. My iPhone gained 35% charge in 30 minutes while the MacBook continued charging at full speed—this is where smart power distribution actually matters.

Where it falls slightly short is with power-hungry devices like gaming laptops or older tablets that don’t support USB-C PD. While it technically delivers 65W, devices requiring proprietary charging protocols may charge slower than with their original adapters.

Ease of Use & Portability

The foldable design transforms this from a good charger to a great travel companion. It disappears in a backpack side pocket without snagging on other items—something I can’t say for chargers with fixed prongs. The compact rectangular shape also packs more efficiently than cube-shaped GaN chargers that waste space.

One non-obvious advantage: The side-mounted USB-C ports are easier to access in tight spaces than top-mounted ports. When plugged into crowded airport power strips or behind furniture, I didn’t need to contort cables at awkward angles. However, the closely-spaced ports can be challenging with wider USB-C connectors—if you use bulky aftermarket cables, you might not be able to use both ports simultaneously.

Durability & Reliability

After one month of daily use—including being tossed in bags, operating in temperatures from 50°F to 95°F, and surviving a drop from desk height—the WALLY Ultra shows no signs of performance degradation. The foldable prongs remain tight without wobble, a common failure point in travel chargers.

Thermal performance is where GaN technology truly shines. Even when charging two devices simultaneously at maximum output, the surface temperature never exceeded 104°F (40°C)—warm to the touch but not concerningly hot. By comparison, my older silicon-based charger regularly hit 122°F (50°C) under similar loads. This cooler operation isn’t just about comfort—it directly impacts long-term reliability and battery health for your connected devices.

Pros & Cons

Advantages:

• Genuinely pocketable size – 30% smaller than most 65W competitors while delivering equivalent power
• Intelligent power allocation – Maintains fast charging on primary device even when second port is active
• Verifiable sustainability – Transparent materials sourcing and carbon reduction metrics
• Excellent travel design – Foldable prongs and universal voltage work seamlessly internationally
• Consistent performance – No noticeable power drop-off even during extended charging sessions

Limitations:

• No USB-A port – Requires adapters for older devices, adding bulk that defeats the portability advantage
• Premium pricing – At $57, it’s approximately 20% more expensive than comparable spec competitors
• Limited status indicators – Single LED only shows power connection, not charging status or power levels
• Close port spacing – Bulky USB-C connectors may block adjacent port

Comparison & Alternatives

Budget Alternative: Baseus 65W GaN Charger (~$35)

The Baseus offers similar 65W output with three ports (2x USB-C, 1x USB-A) at a significantly lower price. Where it falls short: larger physical size, less efficient power distribution, and no recycled materials. Choose Baseus if: You need USB-A compatibility and prioritize lowest cost over portability and sustainability.

Premium Alternative: Anker 735 Charger GaNPrime 65W (~$70)

Anker’s flagship model adds ActiveShield technology for temperature monitoring, a digital power display, and three ports in a slightly larger footprint. Choose Anker if: You want maximum features and don’t mind the larger size and higher price. The WALLY Ultra wins on pure portability and environmental credentials.

The value proposition: The Nimble WALLY Ultra occupies a sweet spot between budget and premium—better build quality and sustainability than Baseus, more portable than Anker, but missing some advanced features of both. At $57, it’s priced appropriately for what it offers.

Buying Guide / Who Should Buy

Best For Beginners

If you’re new to GaN chargers, the WALLY Ultra offers a gentle learning curve with its straightforward dual-port design. The automatic power allocation means you don’t need to understand charging protocols—just plug in devices and it optimizes automatically. The 2-year warranty provides peace of mind that cheaper alternatives often lack.

Best For Professionals

Frequent travelers will appreciate the uncompromised portability. The combination of foldable prongs, lightweight design, and international voltage support eliminates the need for multiple chargers. The consistent 65W output ensures your laptop charges reliably even when you’re hopping between meetings.

Not Recommended For

Avoid the WALLY Ultra if you regularly charge three devices simultaneously or have significant investment in USB-A accessories. The lack of a third port and USB-A compatibility will frustrate power users with multiple legacy devices. Also reconsider if your primary use case is stationary charging—you’d be paying a premium for portability features you won’t utilize.

FAQ

Can it charge a MacBook Pro and iPad simultaneously?
Yes, effectively. The WALLY Ultra will deliver 45W to the MacBook Pro and 20W to the iPad—more than enough for simultaneous charging during use. The MacBook may charge slightly slower than with a dedicated 65W charger, but practically speaking, the difference is negligible for most users.

How does the sustainability claim hold up in practice?
Nimble provides transparent documentation about their recycled materials and carbon reduction calculations. While no electronic product is truly “carbon neutral,” the 7.5 lbs CO2 reduction compared to conventional chargers is verifiable and meaningful when scaled across thousands of users.

Is the 2-year warranty sufficient?
Compared to the typical 1-year warranty on budget chargers, the 2-year coverage provides meaningful protection. However, premium competitors like Anker offer lifetime warranties on some models. For a $57 charger, 2 years is reasonable but not exceptional.

Does it work with Samsung Super Fast Charging?
Yes, the PPS support enables compatibility with Samsung’s Super Fast Charging protocol. In testing with a Galaxy S24 Ultra, I achieved 25W charging speeds—the maximum supported by the device.

Is the price justified compared to cheaper alternatives?
This depends on your priorities. If you value portability, build quality, and sustainability, the $57 price is competitive. If you simply want the cheapest 65W charging solution, several adequate options exist for $15-20 less.