Reviews AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) white
Interested in reviews of AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) white? It got 4.7 out of 5 stars from our customers. Find specific customer reviews of AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) white below. We will appreciate if you also share your experiences with AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) white after purchasing.
User Reviews
Customer
Rated 27/11/2025, variant AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) white
Verified purchase - review from a price comparison website
Speed
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Miroslav, Třebíč 1
Rated 15/10/2025, variant AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) white
Verified purchase
Out of the box, the powerbank looked good, but stopped responding completely on the first charge.
Fortunately, the Alza branch immediately replaced it with another model without any problems and it works perfectly. I appreciate the approach of the dealer who resolved the situation quickly and helpfully. I am writing this review mainly as a warning to others - it seems that there is the occasional defective piece in this series, but if it works, it meets the parameters.
Elegant design, compact dimensions
Good parameters (capacity 20 000 mAh, PD 22.5 W)
When charging for the first time it stopped responding (no LED, did not charge)
Apparently weaker quality control for this series
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Customer, Mělník
Rated 25/09/2025, variant AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) white
Verified purchase
Battery life
Design
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Dominik, Brno
Rated 12/09/2025, variant AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) white
Verified purchase
It's not that heavy
Nice in appearance
Nothing yet, I just unpacked it (I'll upgrade)
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Anonymous customer
Rated 30/09/2026, variant AlzaPower Onyx Gen2 10000mAh Power Delivery (22.5W) black
Verified purchase
Ideal for school
Fast charging
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Jaroslav, Černošice
Rated 28/09/2026, variant AlzaPower Onyx Gen2 10000mAh Power Delivery (22.5W) black
Verified purchase - review from a price comparison website
Great capacity (from a single charge)
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Aki Wendel, praha
Rated 27/09/2026, variant AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) black
Verified purchase
Super. Isn't overpriced.
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Vladimír, Tišice
Rated 20/09/2026, variant AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) black
Verified purchase
Does what it's supposed to, with the capacity it states.
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Tomáš, Černolice
Rated 11/09/2026, variant AlzaPower Onyx Gen2 10000mAh Power Delivery (22.5W) black
Verified purchase - review from a price comparison website
Capacity
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Václav, Klatovy
Rated 10/09/2026, variant AlzaPower Onyx Gen2 20000mAh Power Delivery (22.5W) black
Verified purchase - review from a price comparison website
Fast charging (phone)
Easy to control (when the device is connected)
Large capacity
More outputs
Portability
The remaining capacity indicator is unclear.
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