Interested in reviews of AlzaPower Onyx 20000mAh USB-C Black? It got 4.6 out of 5 stars from our customers. Find specific customer reviews of AlzaPower Onyx 20000mAh USB-C Black below. We will appreciate if you also share your experiences with AlzaPower Onyx 20000mAh USB-C Black after purchasing.
Rated 10/03/2025, variant AlzaPower Onyx 20000mAh USB-C Black
Verified purchase
I traveled with it in Europe during summer and got a very weird melted plastic smell on the middle of the bus ride. turns out the powerbank was overheating and melting and smoking.
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Lucie, Praha 4 - Michle
Rated 04/09/2024, variant AlzaPower Onyx 20000mAh USB-C Black
Verified purchase - review from a price comparison website
A classic power bank. He's doing his job.
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Tomycar, Davle
Rated 16/07/2024, variant AlzaPower Onyx 20000mAh USB-C Black
Verified purchase
super
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Adolf, České Budějovice
Rated 26/05/2024, variant AlzaPower Onyx 20000mAh USB-C Black
Verified purchase
In the backpack OK
Smaller capacity than stated
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Svatava, Velká Bystřice
Rated 25/05/2024, variant AlzaPower Onyx 20000mAh USB-C Black
Verified purchase
CAPACITY FITS
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David, Lipník Nad bečvou
Rated 01/05/2024, variant AlzaPower Onyx 20000mAh USB-C Black
Verified purchase
I've been running on 2 powerbanks on a daily basis for almost 3 months now and all without problems, as long as I found the right cables (alza power worked terribly slow)
It's been working for me for a year
Charges quickly if it sits with the cable, which is not to be expected
With the alza power cable 10cm (usb C - usb C) it charges the phone for 10h, but with the cable I bought in a Polish supermarket it runs at full speed
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Stanislav, Brno
Rated 25/04/2024, variant AlzaPower Onyx 20000mAh USB-C Black
Verified purchase
survived everything with me and still works fine
Charging via USB-C and micro USB
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Václav, Týn nad Vltavou
Rated 09/04/2024, variant AlzaPower Onyx 20000mAh USB-C Black
Verified purchase
I've been using it regularly for two years now and I can't praise it enough.
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Radek, Hlavní město Praha Libeň
Rated 13/02/2024, variant AlzaPower Onyx 20000mAh USB-C Black
Verified purchase
I already have one, after the experience I bought the second one for my wife
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Lukáš, Brno
Rated 15/01/2024, variant AlzaPower Onyx 20000mAh USB-C Black
Verified purchase
Despite occasional use, it died after 1.5 years
Charge status indication very difficult to see
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