Popular 20,000mAh power bank from Alza significantly discounted. But there's a catch

Looking for a new power bank that can charge your phone more than twice? The popular AlzaPower Parade Gen2 in black is available with AlzaPlus+ for 559 CZK instead of 799 CZK. Over 5,000 units have been sold in total, and the overall rating is 4.7/5.

Quick summary:
✅ Makes sense if you want a reliable everyday power bank with an LCD display and support for most fast-charging protocols.
⚠️ Consider carefully if you need higher PD output (for a laptop) or super-fast charging for the bank itself – here it takes 5 hours for full capacity.
💡 For 559 CZK with AlzaPlus+, you get a proven bestseller with a 3-year warranty.

Why this power bank is interesting

Parade Gen2 targets the classic scenario of travel and everyday phone backup. In this price range, you typically look for either a 10000mAh bank with a solid display or a 20000mAh one without – Parade Gen2 offers both at once. The clear LCD display shows the exact percentage status as well as charging parameters (voltage, current), so guessing “does it still have enough, or not anymore” is a thing of the past. This is by far the most praised feature in reviews.

Key parameters explained simply

The 20,000 mAh (75 Wh) Li-pol battery capacity is realistically enough for approximately 3–4 full charges of a modern phone. After accounting for losses in the converter and cable (typically 85% efficiency), you’ll get about 14,000–15,000 mAh of usable capacity – this is not a product weakness, but a physical reality for all power banks in this class. The 75 Wh capacity makes the power bank a perfectly suitable choice for air travel, remaining well below the 100 Wh limit for carry-on luggage.

The power bank has 3 outputs: 2× USB-C and 1× USB-A, with support for Power Delivery 3.0, Qualcomm Quick Charge 3.0, Samsung Adaptive Fast Charge, and Apple 2.4A. The maximum output power is 22.5 W – sufficient for fast phone charging, but not for rapid laptop charging. Smart IC automatically detects the device and distributes power, so the bank itself chooses how to charge an iPhone, Samsung, or headphones.

Important detail: Low Power Mode for charging watches and headphones is activated by holding the button for 5 seconds, and a dot will light up in the left corner of the display. Without it, the power bank automatically turns off for small devices with low power consumption. The input power for charging the power bank itself is 18 W, and a full charge takes 5 hours – standard for the sub-600 CZK price range; more expensive models with 65W input can charge in 1–2 hours.

What is AlzaPlus+ and when is it worth it

AlzaPlus+ is a paid membership that gives you free delivery from Alza with no minimum order value and exclusive discounts on selected products. The membership fee is 25 CZK per month with an annual plan (299 CZK annually) or 59 CZK per month. Membership can be canceled at any time without penalty.

For this power bank, the difference with and without membership is 240 CZK – if you were to activate AlzaPlus+ just for this order and cancel it after a month, it would be cheaper than buying without membership. In the long term, AlzaPlus+ typically pays off from the fifth purchase in a year, especially if you order small items for which you would otherwise pay shipping. The average annual saving, according to Alza, is 1,500 CZK.

Practical aspects: cable, display, and packaging

The package includes a reversible USB-C cable with a loop, which is 30 cm long and can be attached to keys or a backpack – very convenient in practice, as you always have the cable when using the power bank. Dimensions of 145 × 68 × 28 mm place the power bank among standard 20000mAh models, the weight corresponds to the capacity, and the body is made of flame-retardant material according to UL94 standard. The warranty is 36 months, one year more than the statutory standard.

What users say

From over 160 text reviews, a consistent picture emerges. Users positively highlight the clear display, high capacity, support for multiple charging protocols, practical cable with a loop, and price/performance ratio. Several reviewers mention using the power bank for a year and it still holding its capacity. One technically-oriented user measured an efficiency of approximately 84%, which corresponds to the standard for this price class.

Criticism points to two recurring issues. The display scratches easily – the plastic has low durability, so if you want a perfect appearance for many years, count on a protective film or careful handling. The slow charging of the power bank itself (5 hours via 18W input) is expected for such a large capacity, but more expensive 100W power banks handle it significantly faster. A few users reported lower actual capacity than the declared 20000 mAh – this is again common, as the power bank states the nominal cell capacity at 3.7 V, whereas at the 5 V output, you get less due to voltage conversion.

When it doesn’t make sense

If you need a power bank for charging a laptop, look for models with a 65W to 100W PD profile (for example, AlzaPower Parade Gen2 27000mAh for 1,399 CZK or Vention models). Here, the limit is 22.5 W, which is not enough for an ultrabook. Similarly, it doesn’t make sense for people who want MagSafe or Qi wireless charging – Parade Gen2 is purely a wired classic.

And if you’re looking for super-fast charging of the power bank itself, keep in mind that 5 hours for a full charge is not standard for 100W models. Today, you can buy a comparable 27000mAh power bank that charges in an hour and a half.

Verdict: who it’s worth it for

For 559 CZK with AlzaPlus+, Parade Gen2 is a clear choice for the classic scenario – backup for a phone, tablet, headphones, and watch on the go. The combination of 4.7 out of 5, 91% recommendation, and a return rate of 0.38% gives a very consistent signal at this price point: the product works, and very few units are returned. The price of 559 CZK for AlzaPlus+ members offers one of the most advantageous price/capacity ratios on the market, especially thanks to the LCD display, which is not a given at this level.

Do you buy a power bank more based on capacity, or do you primarily look at power output and fast-charging support?