Review: CUKTECH 15 Ultra power bank delivers juice for days

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Are you always looking nervously at your phone battery percentage while you’re on the go? Does the sight of your battery’s rapid depletion induce a horrific sweaty palm moment?

Whether you’re traveling, commuting, or just powering through a busy day, the CUKTECH 15 Ultra portable charger makes sure your devices keep up with you.

With 165W output and a generous 20,000mAh capacity, it’s one of the most versatile power banks I’ve tested.

Here’s why it’s earned a permanent spot in my travel bag.

What’s in the box?

CUKTECH doesn’t skimp on the accessories. Here’s what you get:

• CUKTECH 15 Ultra Power Bank (20K, 165W)
• USB-C to USB-C cable (240W Max, 3.2ft)
• Travel pouch
• User manual
• Device literature with an 18-month warranty

In my experience, it’s great not having to hunt down extra cables—the essentials are all included.

Sleek, solid, and surprisingly compact

The CUKTECH 15 Ultra makes a strong impression straight away with its design and build.

It comes in a space-gray plastic chassis, accented by a high-luster black panel on the front and a black non-slip plastic panel on the back, making it easy to grip and handle on the move.

In terms of layout, the front face features the 1.3-inch smart TFT color display alongside a power/wake button.

On the top of the device, you’ll find the charging ports: one 100W USB Type-C, one 45W USB Type-C, and one 18W USB Type-A, all positioned for easy access.

I found it compact enough to fit easily into a bag or jacket pocket, and it feels solidly built—sturdy enough to travel with and not worry about knocks or scratches.

Power that goes the distance

Let’s talk performance, because this charger delivers in spades.

It supports 165W max total output, with 140W from a single port via PD3.1. You can charge a phone, a tablet, and a laptop all at once without missing a watt.

During my testing, I charged my 5600mAh Honor Magic 6 Pro in about 25 minutes while simultaneously powering up my tablet—no slowdown, no problem.

And when it’s time to recharge the power bank itself, dual-port simultaneous input and 165W max input means you’ll get up to 70% charge in just 20 minutes. That’s incredibly convenient if you’re in a rush or constantly on the move.

Smart features you’ll actually use

This isn’t just a battery with brute force… it’s smart, too.

The CUKTECH 15 Ultra supports ADC 2.0 and a broad range of fast-charging protocols: PPS, QC, PD3.1, FCP, SCP, and Xiaomi’s 120W MiPPS. Basically, if your device fast charges, this power bank can handle it.

In my experience, the display is a huge bonus. It keeps you informed with input/output flow, temperature alerts, and protocol info.

I really like that you can even customize the display with an always-on mode. No guesswork—just solid, real-time info.

Petty Foibles?

Honestly, not many. If you’re planning an extended trip off-grid, you might want a bit more capacity than 20,000mAh—but for a couple of days, it’s more than sufficient.

You could always buy two, or opt for the beefy CUKTECH 20 power bank, or even the beefier CUKTECH 30 beast!

One point worth mentioning; the power bank weighs just under 600g. That’s not a problem for me personally, but some people might find it a bit on the heavy side if they’re trying to pack ultra-light.

And in my experience, given how quickly it recharges, you won’t be waiting around long even if it does run low.

Final verdict

Would I recommend the CUKTECH 15 Ultra? Absolutely.

It’s compact, powerful, thoughtfully designed, and fast, both in charging your gear and recharging itself. In my time with it, I’ve found it reliable and refreshingly user-friendly.

Whether you’re a frequent traveler, a student, or just someone who hates the anxiety of a low battery, this power bank has you covered.

Reliable, smart, and surprisingly fast, this is a power bank worth carrying every day.

Are you tired of hunting for power outlets while traveling or commuting? Have you experienced the panic of a dying phone battery during important moments? The CUKTECH 15 Ultra power bank could be your solution. Share your power bank experiences in the comments below, or connect with us on Twitter or Facebook.