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4.92 out of 5
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  • osaVIP2
    BA
    10/12/2021

    Excellent UPS for 5V. I tried it with Raspberry 3 B, and Raspberry did not report any undervoltage message.

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  • 04/06/2019

    This thing is actually a UPS. Will maintain output with no interruption when either the battery or the input 5V is disconnected. Charges batteries to 4.1V steady (using protected 18650 cells, always good to be safe). Have not finished testing discharge level yet.

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  • 05/08/2019

    arrived in good condition

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  • 04/08/2022

    Have been using this now for a couple of months - is excellent for occasional power outages - in my application was able to provide power for 4 hours using 2 x 2000mah batteries. The only thing I can see is that there's no low-voltage cut-off, which would lead to battery damage in time, as it would have run them flat had I not removed them for that time.

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  • 12/02/2024

    This article can serve as a small UPS for 5V devices not requiring high currents to operate. When normal power supply fails, it can maintain the 5V output from a Li-ion battery thanks to the step-up converter present in the module. The battery is always charged, and the duration of the power disruption supported depends on the battery's capacity used and the device consumption.

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  • 17/10/2023

    Good affordable power backup (UPS like) for 5 V powered devices. It uses 2 x 18650 3.7 V batteries in parallel, but I preferred to use a single battery with 3500 mAh capacity instead of 2 with less capacity.

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  • 23/05/2023

    Perfect power backup for 5V powered devices not requiring much current. The max duration depends on the capacity of 18650 batteries used and the current required by the device. balancing both things you can have a very useful device to maintain service with power cuts.

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  • 26/03/2024

    Very good

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  • 01/02/2024

    Well for electronic prototyping

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  • 02/10/2023

    Brilliant device

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