Interested in reviews of AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black? It got 4.8 out of 5 stars from our customers. Find specific customer reviews of AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black below. We will appreciate if you also share your experiences with AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black after purchasing.
Rated 13/04/2025, variant AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black
Verified purchase
Velmi dobra powerbanka
Nabije tak 3 telefony
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Dušan, Teplicka n Vahom
Rated 08/04/2022, variant AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black
Verified purchase
It managed to charge 3x Samsung Galaxy s20
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Petra, Říčany
Rated 07/09/2026, variant AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black
Verified purchase
Excellent, I've had it for years.
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Ivo, Vonoklasy
Rated 04/04/2026, variant AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black
Verified purchase
The battery in the powerbank has ballooned after a few years of moderate use. It's probably fine if a cheap battery loses capacity after a while, but a blowout indicates poor quality control and a manufacturing defect that can cause a dangerous fire.
After a couple of years, it ballooned
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Lucie, Praha 4 - Nusle
Rated 11/02/2026, variant AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black
Verified purchase
supports fast charging
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Jaromír, Plzeň
Rated 04/01/2026, variant AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black
Verified purchase
Small and lightweight design
Ports
Capacity decreases more significantly with time
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Pavlína, Středokluky
Rated 03/12/2025, variant AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black
Verified purchase
Charges approx. 4 mobile
Takes a long time to charge, several hours
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Petr, Zlín 1
Rated 16/11/2025, variant AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black
Verified purchase
cheap
I complained after 3.5 months, it stopped charging. Settled within 30min by refund, so probably a system problem somewhere
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Anonymous customer
Rated 05/11/2025, variant AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black
Verified purchase
Satisfaction
battery capacity
heavier weight
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Milan, Olomouc
Rated 02/11/2025, variant AlzaPower Onyx 20000mAh Fast Charge + PD3.0 black
Verified purchase
everything ok
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