Practical travel power bank discounted by three hundred crowns. It will entice with its capacity, performance, and design.

Do you travel often and are looking for a power bank that offers solid capacity, performance suitable for charging a laptop, and a practical design? Swissten 25000 mAh now costs 1,359 CZK instead of 1,699 CZK with code ALZADNY20. It features an integrated cable and displays charging details on its screen.

Quick summary:
✅ Makes sense if you want a large travel power bank that can charge a laptop and fits within the airline limit.
⚠️ Consider that the full 100 W is only available via USB-C, and the actual usable capacity is lower than the stated 25,000 mAh.
💡 For 1,359 CZK, you get an integrated cable and display, but the battery itself only has a six-month warranty.

Why this power bank is interesting

The main advantage is the combination of large capacity and 100W power via USB-C. Thanks to this, this Swissten power bank can charge not only phones or tablets but also a range of laptops, including selected MacBooks. The integrated 20cm USB-C cable directly in the body is also practical — you don’t have to carry a separate cable. A digital display informs you about the charging status, showing the remaining capacity as well as the current input and output power.

Key parameters explained in plain language

The power bank has three outputs: two USB-C and one USB-A, so you can charge multiple devices at once. Power Delivery 3.0 and PPS ensure fast charging, allowing it to handle even more demanding devices. Inside are five Li-Polymer cells, and the body is made of fire-resistant ABS and polycarbonate. It includes protection against overvoltage, short circuit, overheating, and overcharging. The weight of 430 g is normal for its capacity — you won’t put it in a shirt pocket, but it’s fine for a travel backpack.

Important clarification regarding performance: the full 100 W is only available from the USB-C port. USB-A handles a maximum of 22.5 W, so for fast laptop charging, always use USB-C. The power bank’s input can handle up to 65 W, so with a sufficiently powerful adapter, you can recharge it quite quickly.

How much it actually charges

Here, one thing needs to be said frankly, which manufacturers are reluctant to emphasize: the 25,000 mAh rating applies to the cells inside (at 3.7 V), not to what actually reaches your phone. After converting to 5 V and accounting for charging losses, you will realistically get approximately 3 to 4 full charges for a typical phone, not five, as simple division might suggest. However, this is still enough for a weekend without a charger or for a longer trip, and in practice, these numbers apply to every power bank, not just this one.

Power bank for airplanes: what applies

This power bank is also marketed as suitable for airplanes, and it has a real basis — its capacity corresponds to approximately 92.5 Wh, which is below the 100 Wh limit that airlines consider problem-free. However, a few things apply to all power banks and are good to know: they belong exclusively in carry-on luggage, never in checked baggage, and the device must have its capacity clearly stated, otherwise, it may be confiscated at security.

A newer thing you’ll encounter more and more often: some airlines restrict the use of power banks directly during the flight or require you to keep them out of the overhead compartment (e.g., in the seat pocket in front of you). Before traveling, therefore, check the rules of the specific carrier — for most regular flights with this capacity, there will be no problem.

What to watch out for

The first thing is the battery warranty. The product as a whole has a 24-month warranty, but the battery itself is only covered for six months, as it is considered a consumable item. This is common for power banks, but it’s fair to know that the most important part, which loses capacity over time, has shorter coverage. Second thing: only an integrated 20cm cable is included in the package, not a charger. To utilize the fast input of up to 65 W, you will need your own more powerful USB-C adapter.

And thirdly, a practical detail: the integrated cable is short (20 cm), which is great for a power bank in a jacket pocket, but less convenient if you want to use your phone further away from it. If you need more freedom, be prepared to pack another longer cable.

When it doesn’t make sense

If you are looking for a lightweight pocket power bank for occasional phone charging, this one is unnecessarily large and heavy — a smaller model around 10,000 mAh would suffice. Similarly, if you only charge via USB-A and are not interested in fast charging via USB-C, you are overpaying for power you won’t use. Conversely, for travelers who need to charge both a laptop and a phone and want a reserve for a few days, it is a reasonable choice at 1,359 CZK.

Verdict: who it’s worth it for

The Swissten 25000 mAh is a solid travel power bank for anyone who wants to charge a laptop, have an integrated cable handy, and not exceed the airline limit. At 1,359 CZK with code ALZADNY20, it’s a decent offer. However, be aware of the realities of high-capacity power banks: lower actual capacity, 100 W only via USB-C, a battery with a six-month warranty, and no charger included in the package. Those who account for this will get a reliable travel companion.

Do you opt for a large travel power bank, or is a smaller pocket-sized model enough for you?