Alza has a new 40,000mAh power bank. It has four ports and can also charge a laptop

Are you looking for a high-capacity power bank that also offers sufficient power for charging a laptop? Alza has now expanded its AlzaPower product catalog with the Magma 40000mAh power bank, priced at 2,190 CZK. It features a total of four ports and even includes a display that shows more than just percentages.

Quick summary:
✅ Makes sense if you’re looking for one power bank for your mobile, tablet, and laptop, and need a capacity that lasts several days without an outlet.
⚠️ Consider if you want to take it on a plane – with a capacity of 148 Wh, it exceeds the 100 Wh limit and requires airline approval; some carriers prohibit cabin transport.
💡 For 2,190 CZK, you get full 100W PD input and output, four ports, and a three-year warranty – which is not standard for 40000mAh models on the Czech market.

Why this power bank is interesting

AlzaPower Magma targets precisely the category that ordinary power banks don’t cover: a single portable power source that can power a mobile phone, headphones, tablet, and even a work laptop. It’s not a typical “few percent rescue for your phone,” but a device that can genuinely be used for work on the go, at a cabin, or during a power outage. A capacity of 40,000 mAh (148 Wh) provides plenty of charging even for energy-intensive devices.

Crucially, the Magma is new in Alza’s offer at a price of 2,190 CZK and comes with a three-year warranty – for power banks of a similar class, the warranty is usually shorter, and for unbranded cheap models, it often represents more of a lottery after the first problem. Furthermore, AlzaPower offers immediate replacement at branches in case of defects, which is a practical difference compared to a standard warranty claim.

Power Delivery 100 W: enough even for a laptop

The main parameter that makes a high-capacity power bank worth considering is Power Delivery 3.0 up to 100 W on USB-C. This power can handle the vast majority of 13″ and 14″ laptops, including MacBook Air and Pro, Dell XPS series, Lenovo ThinkPads, or ultrabooks with USB-C power. Specifically, the USB-C ports support 5/9/12/15/20 V up to 5 A, which corresponds to the full 100W PD profile. 100 W is also sufficient for slower charging of more powerful 16″ laptops under moderate load.

In addition to PD, you’ll also find Qualcomm Quick Charge 3.0, Samsung AFC, Huawei FCP, and Apple 2.4 A – in other words, it covers virtually the entire range of smartphones without you having to worry about compatibility. Smart IC technology automatically detects the connected device and distributes power so that no one is unnecessarily throttled.

Four Ports, LCD Display, and Pass Through

Connectivity is generous – 2× USB-C and 2× USB-A, allowing you to charge up to four devices simultaneously. When all four ports are used at once, the total power is distributed as 65 + 15 W, which is still a good distribution for a mix of laptop + phone + headphones + watch. The LCD display shows the remaining capacity in percentages and current charging data – no need to guess how much you have left based on four LED dots.

The Pass Through function is useful, allowing you to charge the power bank and simultaneously power a connected device from it – practical when you have one outlet and two things that need charging. Low Power Mode, activated by holding the button for 3 seconds, is designed for headphones, smartwatches, and other low-power devices, for which the standard mode might block charging due to excessively low current.

Practical Aspects: Dimensions, Charging, and Durability

Dimensions of 190 × 95 × 27 mm correspond to two phones stacked on top of each other – it fits into a jacket pocket, but not a jeans pocket. This is a typical size for the 40000mAh category. The body is aluminum and supplemented with flame-retardant materials meeting the UL94 standard, which is not a cosmetic detail for mobile power sources with 148 Wh inside. 6-fold protection addresses overvoltage, overload, short circuit, overheating, overcharging, and undervoltage.

What pleasantly surprised me is the charging time – the Magma charges in approximately 2 hours when using a 100W charger. Older 40000mAh models typically needed 6 to 10 hours because they only supported weak input. Two hours for this capacity is solid. The package includes a reversible USB-C cable with a length of 50 cm – sufficient for charging, but anyone who wants to place the cable next to a laptop on a desk will need to purchase a longer one.

Caution for Air Travel: Capacity Exceeds Limit

One thing deserves special emphasis. The capacity of 148 Wh exceeds the standard 100 Wh limit for transporting lithium batteries in the aircraft cabin without further approval. Power banks in the range of 100–160 Wh are usually transported only with airline approval, typically a maximum of two per passenger – and some airlines do not permit them in the cabin at all. Power banks (of any capacity) do not belong in checked luggage. If you are primarily buying a power bank for frequent flying, consider a model with 99–100 Wh (approximately 27,000 mAh), which passes without obstruction.

What Users Say

The product has been on sale for a short time only, so the review sample is still very small – 3 ratings with an average of 4.7 out of 5 and 100% recommending it, but no written user reviews yet. Alza states that over 50 units have been sold. We will have to wait several weeks for relevant feedback on its strengths and weaknesses in real-world operation. We will update the article as soon as a representative sample of feedback appears.

What can be assessed now are the paper specifications compared to the competition. In the 40000mAh / 100W PD category, models like INIU, Anker 737 PowerCore 24K (which has 24000 mAh/140 W), or UGREEN Nexode are available – they tend to be priced higher or comparably, but without a 36-month Czech warranty and service network. Magma thus targets people who want a competitively specified product with local support.

When it Doesn’t Make Sense

This power bank is not for everyone. If you only occasionally charge your phone and need something for your pocket, 40,000 mAh is unnecessary overkill – a model around 10,000 mAh at a quarter of the price will suffice. If you fly regularly and don’t want to deal with airline approval, opt for a 27000mAh version under 100 Wh. And if you need to power a 16″ gaming laptop under load, 100 W might not be enough – for such cases, models with 140W PD 3.1 or smaller portable power stations are more suitable.

Verdict: Who Benefits from Magma

If you want one power bank for everything – phone, tablet, headphones, laptop on the go – and at the same time don’t want to risk an unbranded Chinese model without service, the AlzaPower Magma for 2,190 CZK is a logical choice. You get full 100W PD input and output, four ports, an LCD display, an aluminum body, and a three-year warranty with immediate replacement. The main compromises are size, weight, and the 148 Wh limit addressed by aviation regulations. For this price, it’s one of the more complete packages you can buy in our market with Czech service.

Do you primarily need a power bank for your phone, or do you require it to charge a laptop as well?