AlzaPower City are great power banks for five hundred crowns! What sets them apart from the rest?

Alza regularly expands its portfolio under its own AlzaPower brand, and one of the latest additions to the power bank category is the AlzaPower City for 499 Kč. The main attraction is the combination of an integrated USB-C cable with an angled connector, compact dimensions, and a 36-month warranty – an above-standard feature you typically won’t find with competitors at this price point.

Quick summary:
✅ Makes sense if you’re looking for a compact backup for your backpack with an integrated cable and don’t want to worry about where you left your separate cable in the field.
⚠️ Consider if you need to reliably charge a modern phone more than once to full – the physical limits here are the same for AlzaPower as for competitors.
💡 For 499 Kč, it’s one of the most practically well-designed 10,000 mAh power banks on the market thanks to its integrated cable and thin design.

Why this new product is interesting

The main difference between AlzaPower City and most competitors in this price range is the integrated 18 cm USB-C cable with an angled connector. This also doubles as a practical carrying strap, so you can easily attach the power bank to a carabiner or thread it onto a bag strap. Another practical detail is its compact dimensions of 71 × 116 × 15 mm – with a thickness of 15 mm, it’s one of the thinner 10,000mAh power banks on the market, suitable for an internal jacket pocket or a small backpack.

The third difference is service-related: AlzaPower provides a 36-month warranty, and for most products in this line, Alza has a policy of immediate replacement with a new unit directly at its branches.

How many phones you can actually charge with it

This is the part that marketing descriptions usually gloss over. 10,000 mAh of stated capacity does not mean 10,000 mAh of transferred energy to your phone. The internal cells of the power bank operate at 3.85 V (38.5 Wh), but the USB output delivers 5 V or more – during conversion, losses occur, some energy is dissipated as heat, and further percentages are consumed by the control electronics. The realistically usable capacity for a 10,000mAh model is approximately 6,500–6,700 mAh.

In practice, this means the following estimates for 2026: you can fully charge a modern Android phone like the Samsung Galaxy S26 with a battery around 5,000 mAh approximately 1.3 times. An iPhone 17/18 Pro with a 4,000–4,400 mAh battery will get about 1.5 full charges. For smaller phones with a battery around 3,500 mAh, you’ll get around 1.8 charges. AlzaPower City is therefore a compact backup for your backpack for single-day events, not a workhorse for a weekend in the wilderness.

Key parameters: ports, power, fast charging

AlzaPower City has three outputs: an integrated USB-C cable, a separate USB-C port, and a classic USB-A port. Maximum power outputs vary by port – 22.5 W via USB-A, 20 W via the USB-C port, and 18 W via the integrated cable. When charging all three devices simultaneously, the total output drops to 15 W (5 V / 3 A), which is the physical reality for most power banks in this price range – not a marketing trap.

All relevant fast charging protocols are present: USB Power Delivery 3.0, Qualcomm Quick Charge 3.0, Samsung AFC, Huawei FCP, and Apple 2.4 A. Smart IC technology automatically recognizes the connected device and optimizes power. You can recharge the power bank itself via the USB-C port or the integrated cable (which serves as both input and output); with an 18W charger, a full charge takes approximately 3 hours. Be aware – if you only have a 5W charger from the iPhone 5 era, charging will take significantly longer.

Practical aspects: Low Power Mode, display, Pass Through

Three practical features typically missing from inexpensive power banks. Low Power Mode is a mode for charging headphones or smartwatches – it’s activated by holding the button for 3 seconds, visually signaled by the last digit rotating on the display, and automatically turns off after 2 hours. This is important because most power banks simply shut down with low power draw (e.g., an LED strip or headphones), leaving you in the middle of the night with dead smartwatches.

The LCD display shows the charge status precisely in percentages, which is more important for a 10,000mAh model than the three-color LED indicators on the cheapest models. The Pass Through function allows you to charge the power bank and a connected device simultaneously, so you can leave it charging overnight and then connect your phone directly to it in the morning. Safety features include 6-fold protection against overvoltage, overload, short circuit, overheating, overcharging, and under-discharging, and the body is made from non-flammable material according to UL94 standard.

When it doesn’t make sense

If you’re planning a weekend in nature without the possibility of recharging, opt for a 20,000mAh model – the AlzaPower Onyx Gen2 20000mAh costs only a few hundred crowns more in the current sale and will charge your phone three times. Similarly, if you need a power bank for a tablet or laptop, 22.5 W is too little, and you’ll want at least a 65W PD model. And if you prefer magnetic MagSafe charging for your iPhone, look for AlzaPower Qi2 or FIXED MagZen – AlzaPower City is wired.

Verdict: a well-designed basic model for a reasonable price

The AlzaPower City for 499 Kč is one of the most practically well-designed 10,000mAh models in this price range. The integrated cable, thin design, display, Low Power Mode for headphones, and a 36-month warranty are a combination that typically costs a bit more from competitors. No, Alza won’t defy the laws of physics – 10,000 mAh still means 1.3–1.5 full charges for a modern Android phone, not two. But if you’re looking for a compact everyday backup with an emphasis on never forgetting your cable at home, it’s a choice that makes sense.

Do you choose a power bank more for its integrated cable and convenience, or do you prioritize maximum capacity even at the cost of higher weight?