Forget Anker: This 240W power bank is the premium charging accessory your iPhone deserves

I review a lot of power banks — most from the big-name manufacturers — but it’s rare that I come across a standout product from a brand I’ve never heard of. That changed when I discovered Denvix and took their PowerX power bank for a spin. Let me tell you, I was blown away by this powerhouse device designed for laptops. 

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The Denvix PowerX is a beast of a power bank, boasting a 25,000mAh/90Wh capacity. It’s big enough to keep your laptop and other gadgets running, yet still under the 100Wh TSA limit, so you can bring it on a plane in your carry-on without any hassle. To put that into perspective, it can fully charge a MacBook Air more than once and an iPhone over four times. 

When it comes to power output, the PowerX doesn’t disappoint. It features dual USB-C ports capable of 140W input/output individually and 250W output when used together, a USB-A port with a maximum output of 36W, and a wireless charging pad that delivers up to 15W. While the wireless pad isn’t Qi2-compatible and maxes out at 7.5W for iPhones, that’s hardly a dealbreaker.

This variety of ports offers incredible flexibility for charging multiple devices. Plus, the PowerX supports pass-through charging, meaning you can charge the power bank while simultaneously charging other devices. When using pass-through, the power is split, with a maximum of 200W (100W input, 100W output). 

Everything about this power bank screams quality — from the cutting-edge tech to the sleek piano black finish. While the finish looks great, it’s a magnet for fingerprints and dust, so keep a cloth handy. 

Performance-wise, the PowerX lives up to its specs, and it does an excellent job dissipating heat during heavy use.  

The power bank has all the usual over-charge, over-current, over-discharge, short-circuit, and high-temperature protections that you expect from a modern power bank built with safety in mind.

Its standout feature, however, is the color OLED display. It provides a wealth of information, including battery capacity, runtime, input/output for all ports, internal temperature, battery health, total input/output for the unit, battery cycles, and even how many times the screen has been activated. 

The display also auto-rotates, so you’ll never have to awkwardly tilt your head to read it.  

For me, the display is the cherry on top of an already impressive device. Not everyone loves displays on power banks, but I do, and this one is exceptionally well-designed. 

Also: My favorite USB-C accessory just got a major functionality upgrade – and it’s still affordable

Accompanying the power bank is a 3.3-foot USB-C cable that is happy to carry 140W, and a carry bag. Denvix competes the package by offering a 24-month warranty on the power bank. 

ZDNET’s buying advice

For a company I hadn’t heard of before, Denvix’ product truly impressed me. The PowerX 4-in-1 Power Bank is exceptionally well-made, with thoughtful engineering and design touches that clearly show how much care went into creating this product. It stands out in an otherwise crowded market. 

Yes, it’s a dust and fingerprint magnet, but I’m willing to overlook that based on how good the display looks and the sheer amount of reliable power this device can supply.