Reviews AlzaPower Onyx Gen2 5000mAh (12W) black
Interested in reviews of AlzaPower Onyx Gen2 5000mAh (12W) black? It got 4.9 out of 5 stars from our customers. Find specific customer reviews of AlzaPower Onyx Gen2 5000mAh (12W) black below. We will appreciate if you also share your experiences with AlzaPower Onyx Gen2 5000mAh (12W) black after purchasing.
User Reviews
Jiří, Vyškov
Rated 06/10/2026, variant AlzaPower Onyx Gen2 5000mAh (12W) black
Verified purchase
small
foldable
functional
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Vladimír, Praha 8 - Kobylisy
Rated 04/09/2026, variant AlzaPower Onyx Gen2 5000mAh (12W) black
Verified purchase
Small
Cheap
Can charge and discharge via USB C.
Unfortunately, the capacity is just under 16Wh (equivalent to 4320mAh), charging consumes 23Wh (6216mAh), a relatively low efficiency.
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Martin, Ostrava
Rated 05/06/2026, variant AlzaPower Onyx Gen2 5000mAh (12W) black
Verified purchase
Charging with USB-C
otherwise the same as the previous generation
works reliably
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Jan, Brno
Rated 16/04/2026, variant AlzaPower Onyx Gen2 5000mAh (12W) black
Verified purchase
velikost
cena
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Michal, Praha 10
Rated 17/03/2026, variant AlzaPower Onyx Gen2 5000mAh (12W) black
Verified purchase - review from a price comparison website
Satisfaction.
Adequate capacity for most mobile phones (5000 mAh).
Pocket dimensions.
Relatively fast charging of the corresponding device (mobile phone with a capacity of 3000 mAh in about 3 hours).
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Tomáš, Čeperka
Rated 17/03/2026, variant AlzaPower Onyx Gen2 5000mAh (12W) black
Verified purchase - review from a price comparison website
They'll get it quickly
Unfortunately, it lasts only for 1 charge
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Jana, Praha
Rated 17/12/2025, variant AlzaPower Onyx Gen2 5000mAh (12W) black
Verified purchase
small, foldable
USB C and A
sufficient capacity and charging speed
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Customer, Praha
Rated 26/11/2025, variant AlzaPower Onyx Gen2 5000mAh (12W) black
Verified purchase - review from a price comparison website
Great!
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Antonín, Plzeň
Rated 08/10/2025, variant AlzaPower Onyx Gen2 5000mAh (12W) black
Verified purchase
A great little powerbank that can save you and thanks to its size you can carry it everywhere. And now finally with USB-C
Small standby size
Finally USB-C charging
cable in the package
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Ondřej, Dvůr Králové nad Labem
Rated 01/10/2026, variant AlzaPower Onyx Gen2 5000mAh (12W) white
Verified purchase
A brilliant lifesaver for a dead phone to carry in my backpack
Price performance
Size
Weight
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