There was a time when carrying an external battery meant lugging around a heavy, poorly designed brick whose sole purpose was to prevent our phone from dying before we got home. However, the landscape has changed dramatically. Today, we look not only for capacity, but also for speed, design, and above all, versatility. In this context, the brand Cuktech It has burst onto the scene with unprecedented force, offering solutions that seem like something out of a science fiction movie but with overwhelming practical utility.
I've had the opportunity to thoroughly test two of their most interesting models: the imposing Cuktech 15 and the surprisingly small Cuktech 10 MiniAlthough they share a similar aesthetic and reliability, they're aimed at slightly different audiences, or perhaps at different times of the day. Below, I break down my experience with these two accessories that have become inseparable from my backpack and pockets.
Cuktech 15: Raw power for those who can't stop
When you take the Cuktech 15 out of its box, the first thing you notice is that this isn't a toy. It has a weight that conveys solidity and a space gray finish with textures that facilitate grip. But what really matters is inside: a 20.000 mAh capacity and a combined output power that takes your breath away. The most relevant feature of the Cuktech 15 is its main USB-C port, capable of delivering up to 100W powerThis means it not only charges a mobile phone at full speed, but it can also power a MacBook Pro or any laptop compatible with PD (Power Delivery) charging without breaking a sweat. In my tests, it was able to maintain my outdoor workflow exactly as if it were plugged into a wall outlet.
One of the features I appreciate most is its front display. It's not your typical four-dot LED indicator that leaves you guessing how much power is left. Here, you get precise information about the remaining percentage and, even better, real-time input and output wattage. This lets you know exactly how much power each connected device is using and how long the power bank itself will take to recharge—which, by the way, it does at 65W, fully charging in just over an hour and a half.
Using the Cuktech 15 for a week of intense work has been eye-opening. Its elongated, flask-like shape makes it convenient to carry in the side compartment of a backpack. Despite its large capacity, it complies with aviation regulations, so it has become my favorite flight companion. I was able to charge an iPhone, wireless headphones, and give my laptop a power boost simultaneously without noticing excessive heat, which speaks volumes about the device's thermal management. 89,99 euros on AmazonIt's an investment that's justified when you need real autonomy for more than one high-consumption device.
Cuktech 10 Mini: The perfect balance between size and performance
If the Cuktech 15 is the muscle, the Cuktech 10 Mini is the agility. We often make the mistake of thinking that a good battery has to be huge. This model proves that efficiency can fit in the palm of your hand. With a current price of €29,79 thanks to spring sales, it's positioned as a near-essential option for any smartphone user.
The Cuktech 10 Mini has a 10.000 mAh capacity. To give you an idea, this is enough to charge a current high-end phone between one and a half and two times. But its greatest strength isn't its capacity, but its 30W output. Many wall chargers we have at home are slower than this small battery. It's capable of activating fast charging on most modern devices, saving us hours of waiting.
A design that makes you want to wear it all the time.
What I liked most about the 10 Mini is its chassis. It has a very pleasant, textured feel and a size comparable to a credit card, although it's obviously thicker. It fits in a jeans pocket without being too bulky and is perfect for those days when you know you'll be out taking photos or using GPS and don't want to carry a backpack just for extra power.
My experience with it has been one of "invisible peace of mind." I've carried it in my jacket pocket during walks around town and didn't even remember it was there until my phone alerted me to 20% battery. When plugged in, the charging speed is so efficient that in just thirty minutes you have more than enough power to get through the day. It also has a small screen which, although simpler than its larger counterpart, perfectly fulfills its function of indicating the charging status.
Comparison: Which one to choose?
At this point, the question is obvious: which one do I need? The short answer is that it depends on your device ecosystem.
The Cuktech 15 is a productivity tool. If you're someone who travels with a laptop, records a lot of video with your phone, or often carries a powerful tablet, the €89,99 price tag is more than worth it. It gives you the freedom to stop desperately searching for a power outlet in a café or waiting room. It's essentially a portable power station.
On the other hand, the Cuktech 10 Mini is the lifestyle solution. It's for the user who wants security without compromising on weight. Its price of €26,58 (currently on Amazon's Spring Sale) makes it one of the best options on the market under €30, especially considering that its build quality is far superior to the generic batteries we usually find in that price range.
In my case, I've discovered they're not mutually exclusive. The Cuktech 15 lives in my work bag, while the 10 Mini is the one I take when I go out for dinner or a weekend stroll. Both share a very coherent visual language, with that industrial and technological touch that gadget enthusiasts love so much.
Technical details that make the difference
We often overlook safety when talking about batteries, but with Cuktech I've felt particularly reassured. Both models incorporate multiple protection systems against overvoltage, short circuits, and overheating. This is vital when we're connecting devices that cost hundreds or thousands of euros.
Another interesting detail is the compatibility with charging protocols. They're not limited to the Power Delivery (PD) standard, but also support Quick Charge and other protocols specific to Asian brands, ensuring that whatever you connect, the battery will attempt to negotiate the fastest possible charging speed.
In the case of the Cuktech 15, the inclusion of a high-quality cable capable of handling 100W in the box is a major advantage, as users often buy a powerful battery but use an outdated cable that unknowingly limits the charging speed. Cuktech eliminates this bottleneck from the very first minute.
Energy is no longer a concern.
After weeks of testing both devices, my conclusion is clear: Cuktech has arrived to give much more established brands a run for their money. The combination of cutting-edge design, genuine energy efficiency, and competitive pricing makes them stand out in a market saturated with mediocre options.
The Cuktech 15 represents uncompromising power, the perfect ally for the mobile professional. The Cuktech 10 Mini represents the democratization of fast charging in a format that anyone can (and should) carry with them.
If you're tired of your devices letting you down at the worst possible moment, either of these two options will be a great choice. You just have to decide if you need to power a computer or if you simply want your phone to last through your longest days. Either way, the feeling of carrying extra power in your backpack or pocket is something you get used to very quickly and it's hard to give it up once you try it.