The second thing I should highlight from Cuktech 15 Ultra (designed by Cuktech, a company with roots and links with the Xiaomi ecosystem) is that it is transistant, resistant and well designed, has A specific pocket for cable: good detail attention. And, obviously, the first: your weight. We are facing 593 grams.
No, the weight does not bother me. On the contrary, it confirms that the use of materials, load capacity, internal cells and other mechanisms are reliable. In fact, I do not trust those portable batteries that weigh less than a mobile and have twice as much capacity. Well, in this case we talk about 20,000 mAh, enough to load, several times, a smartphone … depending on the model, its compatibility with loading systems and other details. But at least, if we have the CUKTECH 15 ultra to 100%, It will give us two complete charges on any smartphone, minimum.
IMPORTANT: This is a Power Bank, an external battery. They are not loading devices, they do not pursue extreme speed, rather reliability in the “long” term. These types of devices seek to give the greatest amount of energy, not the fastest.
The cable included is also of good quality and can load the S15 ultra to its maximum nominal power of 140 W. and if we add another cable that loads it, Beast mode is triggered: we will have it full in 45 minutes (as long as both loaders add 90 w or more). Important: Do not do it in an environment with temperatures above 25º: it will heat up very fast and reduce speed. An open window is enough to “focus.” For the rest, neither in the load, nor in its role as an emitter, it heats up.
Taking this into account, I would like it to have one more port: it has two USB-C and a USB-A. This would raise its performance and versatility a lot, taking into account that when we go on a trip, we have a minimum, a smartphone and helmets. If we upload the logical bar, a tablet or a laptop, a smart watch, may be a drone or a camera … and that if we travel alone. Sailor desire: a single more port …
In the section of the good news, the external battery is suitable for flights, it has a discreet and standing design. And his screen is a very pleasant surprise. Not only has the load levels, but We can customize so that all its load ports can only be used to load other devices or both at the same time. And this is not common, although I would not dare to say unique. Yes, it must be said that it looks good and with different colors for loading and downloading. Well thought about everything.
I like you to load 70% in just 20 minutes: In an airport or waiting for a trip, it is perfect to return to independence. As usual, the load speed decreases significantly by exceeding 80 %.
As for performance, what is concerned, CUKTECH 15 ULTRA can load a laptop without problem. Of course, it will virtually leave it empty. As for the most common devices, it has a battery for a while: in 10 minutes we went from 0 to 33% in most mobile phones and in less than an hour a complete load is almost achieved.
Verdict: For 90 euros, it is a guarantee of use for a long time. To highlight: the speed at both ends, the screen and customization.